'Side-Step Congestion' / Bus priority systems.

This page looks at the "if I'm going to get caught in traffic, I might as well endure the delay sitting in my car" issue, covering several types of bus priority and Bus Rapid Transit solutions suitable for both roads which are shared with other traffic and dedicated private rights of way.
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Traffic Signal Priority.

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A Schaffhausen, Switzerland, trolleybus turns left from a kerbside lane otherwise dedicated to traffic travelling 'ahead only' so that it can bypass other traffic wanting to turn left. This movement is facilitated by special 'white dot' signals (see close-up right) which are used extensively throughout Switzerland to give street based public transport (buses, trams, etc.,) priority at traffic signal junctions.

Not seen in either picture is an enforcement camera which photographs vehicles jumping the lights when they are red. As the camera captures an image of the front of vehicle it will be possible to recognise the driver.
click me for video
Clicking either the projector icon or this link will download a 16 second video clip named 'Schaffhausen-t-signals320.mpg' which shows the action being described.
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The simple expedient of a green lamp with the words "bus" or "taxi" which illuminate a few seconds before the main signals change from red to green gives Salzburg, Austria's trolleybuses (and taxis) the ability to move off slightly in advance of the general traffic.
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Bus Lanes.

The most well known form of bus priority is the bus lane, which is a traffic lane that for all or part of the day has been restricted to buses only.

In Britain the law says that any motor vehicle constructed or adapted to carry more than 8 passengers (plus the driver) can use a bus lane, unless the word 'local' is included with the bus 'pictogram' on the bus lane road signs, in which case only vehicles providing a local bus service can use it.

'With flow' bus lanes are for buses travelling in the same direction as the general traffic, 'contra-flow' bus lanes allow buses to travel in the opposite direction. The example pictured here comes from Piccadilly, in Central London, and it lets buses side-step the lengthy one-way system that the general traffic has to follow.

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'With-flow' kerbside bus lanes as seen from the top deck of a bus. (Seen 'off-peak' - when delivery vehicles are allowed to stop). The black borders are because the image comes from a camera which takes panoramic photographs. Contra-flow bus lane, in Piccadilly, Central London.

Usually bus lanes are located along the inside (kerbside) lane of the road as this is convenient for passengers at kerbside bus stops. However these bus lanes are often blocked by parked vehicles forcing the buses to divert to the next lane - a process which frequently causes delays to buses and other road users alike. As a contrast because they cannot switch lanes trams usually use the road centre as this keeps the kerb free, for instance for vans delivering goods.

There is no reason why bus lanes cannot be located down the middle of the road too although for safety reasons bus stops would then need to be equipped with island loading platforms as otherwise boarding & alighting the bus would require the passengers to walk out into the path of moving traffic (a potential safety hazard which sometimes happens on older tram systems, although new tram systems always ensure that a safer solution is found).

The principle constraint to central bus lanes and road-centre bus stops with island loading platforms is that many roads are just not wide enough! Whilst it could be possible to widen the roads by demolishing buildings and / or narrowing the footpaths these options would probably result in a public outcry of opposition.

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Bus sharing part of a tram right of way in Krakow, Poland. Image courtesy of Jacek Makuch. Road-centre bus lane in Geneva.

The example shown here from Geneva, Switzerland, is from a road where the kerb lane is sometimes used by a street market, although on other days it is available for on-street parking. This is a two-way road with the other direction's traffic flow only having the use of one lane - not seen in this image is a delivery van which to avoid blocking that lane had parked partially on the footpath.

The other example comes from Krakow in Poland and it shows a two-way tramway where one direction's tracks have been paved to enable buses share the right of way. The sharing of tram rights of way is a simple solution - adding value to the land (roadspace) invested for the trams without negatively impinging on the other road users. Of course this is only a viable proposition in cities which actually have tramway systems!

Bus lanes as part of BRT (bus rapid transit) systems.

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In Arnhem, Holland the "Trolley 2000" transport plan has seen the creation of much reserved lane transport corridors, giving buses the same degree of priority and protection from traffic congestion as other cities give street running trams / light rail. Note the special (white / amber / red 'dot') traffic signals - a feature usually only found on tram systems.

It is advantageous for Arnhem that it uses trolleybuses, which share the same clean air advantages as trams / light rail as this helps it maximise the environmental benefits of its investment in the BRT.

Having seen how the creation of congestion-free transport corridors is such an essential element in the success of light rail many cities globally have been looking at copying this as part of new BRT systems. In so far as busways are cheaper alternative to install than trams / light rail (for instance: the roadway will not need digging up and rails installing) then this is quite understandable, and for many routes - where passenger flows will not be sufficient to support the steel wheeled transports - this can be a very sensible option.

However it is most unfortunate that by choosing to ignore another of the passenger attracting features of light rail the transport operators are quite literally choosing for their system to fail environmentally. Only with trolleybuses can buses achieve the same environmental advantages as the light rail, thereby maximising the benefits of the transport corrider.

It it is known that there are people who simply choose to avoid motorbuses, not just for environmental reasons but also because the travelling environment (noise, vibration, smells) are usually less than favourable. So simply painting a few lines on a road surface and calling it a bus lane is just not enough if transport operators are serious about maximising the benefits / user attractiveness of their system.

It also helps when there are roads wide enough to create bus only lanes without creating urban gridlock - for many British cities this too is a challenge to be overcome. In Europe the creation of such transport rights of way are often coupled with other changes to road layouts to increase traffic capacity on alternative routes.

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Also in Arnhem, a pedestrian crossing with a warning sign that flashes when a bus is approaching.
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'With-flow' kerbside bus & taxi lane protected by a raised kerb along a BRT trolleybus route in Rome, Italy.

The examples from Rome, Italy, shows a roadway where a raised kerb physically segregates one lane for use by buses (and taxis). Note that this is a triple-carriageway road with parking allowed on the outer two carriageways only - although often vehicles also park on the intermediate footpaths too.

A variant of this used in other Italian cities (eg: Milan) sees the general traffic using wider outer carriageways and the public transport using the centre carriageway, which is two lanes wide. (not illustrated)

There is more on bus lanes and illegal parking on a dedicated Parking page whilst island loading platforms are looked at on the Stops and Stations page.


When choosing bus priority options
Are bus lanes always the best option?

This might seem a bizarre question, but in reality whilst most transport planners would say that the answer is a "no-brainer" the reality is often something else.

In June 2006, and after local elections, some local councils in London announced plans to remove a few bus lanes which in their views were not actually of benefit. This led to a lively discussion on an Internet-based forum where some of the members are bus drivers and / or otherwise involved in London's buses professionally. Whilst is not possible to copy exact words (to avoid breaches of copyright) it is possible to report on what was said.

Several people commentated on the (now former) bus lane on Chiswick Bridge over the River Thames in West London. This bus lane effectively reduced the roadway (for the general traffic) from two lanes down to one lane and was installed even though two busy roads fed into it. By closing this bus lane the traffic delays were so reduced that the bus time tables had to be re-written with as much as 10 minutes running time removed!

Another specific bus lane which was mentioned is eastbound at Catford Town Hall, which is a very busy inner city location bisected by London's South Circular Road (SCR). For those readers who are fortunate enough not to know the SCR this grandiose sounding title has been bestowed upon a hotch-potch of unplanned local (and often residential) roads, almost all of which are (at best) no more than single carriageway / two lanes per direction. Several bus drivers were "very keen" to see this 50 yard bus lane removed because by forcing two lanes of traffic to merge into one lane the traffic delays further back were "simply horrendous", often adding 30 minutes to journeys (a time period which was emphasised as being correct and not a typo!)

One bus driver talked of knowing quite a few bus lanes along the routes he drives which do not cause any kind of problem, but because traffic congestion at these locations is very rare so they do not serve any useful purposes either!

There was a general consensus that the primary "problem" with bus lanes which can and does justify their removal is that whilst the buses might be given a clear run over a certain section of road the delays to the other traffic (which has now been denied roadspace) are often of such severity that any benefits the buses might expect to gain are very seriously compromised by the very significant delays the buses experience before reaching the bus lane. Sometimes the best way to help buses travel without delay would be to help keep ALL the traffic flowing more freely - technically this is what local councils are supposed to be doing (as per their legal obligations) however the impression gained is somewhat different. The proliferation of traffic signals, the lack of ability to influence those signals favourably and road space reallocation (away from any form of road traffic) are all issues which harm bus transport.

Perhaps the one comment which speaks volumes suggested that the problem is that certain people get gold stars for the number of miles of bus lane they introduce, rather than for the amount of time saving for buses they manage to generate.

Reading these comments begs the two questions:-
[affirmative responses appreciated]

  1. Should bus drivers be consulted when bus lanes are planned & implemented?
  2. Since they are the people who are "on the front line" and therefore most experienced with respect to traffic congestion "hot-spots", possible solutions and the effectiveness - or otherwise - of any bus lanes, should their views be accorded even greater importance & respect than frequently politically motivated desk-bound transport planners & politicians?


Bus Lane Operating Hours
rush hours? all day? part day? weekends too? 24 hour?

Because bus lanes (on shared use roads) are often a compromise between the needs of different road users so often the hours of bus lane operation will vary from location to location, with the day(s) of the week and times of the day that the bus lane is in operation being (supposed to be) clearly marked on signs at the bus lane entry points. There is also a need for extra signs so that vehicles joining from side roads are properly notified of when the bus lane is in operation, but sometimes transport authorities ignore this requirement. But they still remember to fine those uninformed vehicle drivers if they enter a bus lane when it is in use.

However many drivers of other vehicles (especially cars) seem to either not be able to read the signs, too stupid to understand the signs or just too lazy to read the signs and avoid bus lanes all the time. Of course this is great for the buses but since the aim should be to help the buses keep to the time table then maybe there are times when traffic is such that priority measures are simply not needed.

As an aside another reason why the bus lanes are avoided, even when not active is because with very tough and unforgiving enforcement (often via means of remote surveillance cameras operated by cash-hungry organisations) if the car / van driver is unsure whether the bus lane is in operation they would rather not take a chance and end up with a fine. This often results in those drivers who do read the bus lane signs being able to drive legally along the bus lanes up the inside of a number of sometimes lengthy queues.

On the same Internet-based forum as above some bus drivers commentated on how (because of the way in which the remote surveillance cameras are used) vehicles turning left across bus lanes tend to stay in the main traffic flow until the last second, and when they do turn left they sometimes cut out infront of the moving bus - requiring it to stop "very quickly".

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A bus lane which applies 24/7. A bus lane which applies in the weekday morning and evening rush hours only. This image was captured at the weekend, when traffic was very light, and with buses able to 'wizz along' at normal road speeds running early (when compared to the timetable) is more of an issue.


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Bus lane woes...

This car wanted to turn left but was unable to do so because all the 'general traffic' lanes were filled with stationary traffic queueing to pass a busy traffic signal controlled junction.

Rather than wait in the side road for space to become available (because if the driver did this it is possible that they would end up spending ages waiting for someone to let them in) the driver went as far as possible, in the process blocking the bus lane.


Bus lanes are not much use when the bus cannot even enter it!


See caption for picture information. This example comes from the Holborn area of London; the traffic jam is primarily caused by traffic queueing to pass the next set of traffic signals (not seen here).

The structure on the right is the ramp to the former Kingsway Tram Subway which was used by trams running via the Embankment, The Houses of Parliament and Westminster Bridge. The seven minute journey time is something which the present-day bus passengers can only dream of.

The concept of running buses underground is looked at in the next section.


The road junction in the photograph above has what is known as a "yellow box" where technically road users should not enter unless their exit is clear. The penalty for contravening this involves both a fine and penalty points adding to a driver's license. This applies to bus drivers too!

In London (and other cities'?) transport planners have been so zealous in painting road junctions with yellow boxes and "ringfencing" the junction by extending the area of the box to cover a far larger area than is really appropriate, that sometimes the exit has become so far away from the entrance that it is not possible to see the exit! Then they (the traffic planners) have started to use roadside surveillance cameras to prosecute otherwise innocent road users who inadvertently find themselves forced to break the law. At least once a taxicab driver appealed against his prosecution, and won, because the judge too decided that it was virtually impossible to avoid breaking the law.

The same internet based forum from which the bus lane comments (above) were sourced also discussed yellow box junctions and driver entrapment, with one person sharing a situation where a bus operator told London's transport planners that unless one specific box junction was altered so that their drivers were able to see the exit then it (the bus company) would instruct its drivers that instead of using "commonsense" they must blindly follow the law and never enter the box junction unless their exit is clear. Since the drivers were unable to see the exit this would mean that they would remained stopped at the box junction's entrance. Of course this would have caused traffic chaos, but short of a uniformed police officer telling them otherwise it would be the only legal way to comply with the letter of law!


Another bus driver told of an incident when a taxi driver performed a "u" turn at a traffic light junction with a yellow box, which resulted in the bus no longer being able to exit from the junction without fouling the yellow box.

Despite it not being his fault this resulted in a fine, which the bus company (his employer) paid quickly to benefit from the 50% discount and then docked the funds from the driver's pay.

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Although buses benefit from remote surveillance cameras (& bus mounted cameras) being used to monitor bus lane infringements they are still subject to road traffic laws and this can / does sometimes result in bus drivers (along with other road users) being prosecuted for other traffic infringements.
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An example of a yellow box which has been shortened. Seen at the weekend when traffic is light.


Bus-only Roads

An alternative option to bus lanes is for complete roadways to be dedicated to buses. It could be said that giving buses their own right of way puts them on par with many of the more modern light rail systems, where shared use of the public highway, whilst possible, is usually minimised. However unlike light rail the bus will still need a properly made up road surface. (This does not apply to 'kerb guided' buses, a technology which is looked at below).

As with bus lanes, bus-only roads still need to be protected against abuse by unauthorised vehicles, although typically this will only be at junctions, and not along the entire length. In some cities taxis and the emergency services are also allowed to use bus-only roads.

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In Milan much of the orbital trolleybus service which encircles the city uses triple carriageway roads where the central roadway is restricted to buses and certain other vehicles, such as taxis, motor bikes and the emergency services. Theoretically by having these semi private rights of way the buses are able to operate in BRT (bus rapid transport) mode, although the frequent (and sometimes lengthy) delays at traffic signalled junctions often seem to negate these benefits.

As the image on the right shows, the public transport lanes are at least partially protected by the same CCTV (etc) equipment which is also used to detect vehicles violating the city centre restricted traffic zone. These are probably easier to see in the clickable larger image.

Bus-only roads are frequently major constituent parts of 'Bus Rapid Transit' (BRT) systems, these being enhanced urban transport systems that use rubber-tyred buses - and not steel wheeled trains & trams.

In much of Europe BRT systems are seen as solutions for the less busy transport corridors which need improving but do not justify the higher investment needed for steel-rail based transports. Frequently these will complement the cities' other existing rail based transports although there are a few cities which have installed them instead of steel rail based solutions.

Outside of Europe BRT systems have found favour in some of the less wealthy members of our global family of nations, where the required funds for investment in steel rail based transports are simply unavailable (especially South America) as well as Britain and Australia where the decision to use buses has been either commercially or politically motivated - for both financial and dogmatic reasons.

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In Arnhem, Holland some of the reserved lane transport corridors created under the "Trolley 2000" transport plan are in fact dedicated 'public transport only' roadways - in the example above left both directions are bus / taxi only whilst in the example above right buses travelling in one direction share roadspace with other vehicles on local journeys only.
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The 'TransMilenio' BRT in Bogatá, Colombia. This is located in the median of a dual carriageway and features twin bus lanes per direction because it was designed for both local 'all stations' and express services. As with several other South American BRT systems passengers pay their fares at the entrance to the shelter, so that when the bus arrives they can rapidly board at all doors.
Images sourced from bus manufacturer's promotional material.
The Trans-Val-de-Marne busway in Paris, France. The TVM comprises of a tangential route across southern Parisian suburbs, 80% of which is segregated from traffic.

Image sourced from the free online "Wikipedia" encyclopædia (link to an external site which opens in a new window)

Australia.

Several cities in Australia feature busway systems, including Sydney, Adelaide, Brisbane and Perth - although in the latter some sections of former busway are being converted to heavy rail.

By 2012 Brisbane plans to have a network of 5 busways, which will be in addition to an extensive suburban electric rail system. One of the bus-only roads which is already opened is the South East Busway, which is 16.5km in length and includes 2km of elevated roadway, 1630m of tunnel and 10 bus stations. For much of its length it is located along one side of a six-lane motorway. Although single track in each direction there are overtaking lanes at the stations. This allows express buses to pass buses making stops.

The first stage of Brisbane's Inner North Busway (INB) opened in February 2004, and in 2006 construction began of a second stage which will be routed in tunnels below the city centre and include two underground bus stations. Scheduled to open in late 2008 the INB extension will feed into the already extant large subterranean city centre bus station.

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See caption for picture information. The two images above show part of Brisbane's South East Busway. The lack of road markings in one of them is because the road had just been resurfaced, and the markings were yet to be painted.

The image left shows the 'cage' (as seen from inside a bus) next to RCH (Royal Childrens Hospital) Herston Station on the Inner Northern Busway. The purpose of this wire mesh 'cage' is to protect the buses from the balls of a nearby golf course.

These images are by Aussie Bhoy, and were sourced from a thread named Mixed Brisbane Transport Pictures at the www.skyscrapercity.com group of forums. (link to an external site which opens in a new window).

Canada.

The Canadian Capital of Ottawa features an extensive and successful BRT Transitway. This is based on grade separated bus-only roads that by means of overpasses, bridges, and trench highways are located mostly either above or below street level, so that they rarely intersect directly with the regular traffic. The exception is in the city centre, where delays are commonplace. Buses which use the Transitway benefit from an ability to travel long distances without stopping for a single traffic light. Most sections of the Transitway have a speed limit of 70-90 km/h (45-55 mph) between stations, and 50 km/h (30 mph) in the station areas.

However with nearly 200 diesel buses per hour per direction travelling on the Ottawa Transitway's city centre section it is operating well over capacity. This has caused numerous complaints from residents and businesses about traffic disruption, noise and air pollution from diesel engines. No solution is in sight because even though the system was designed for conversion to light rail, the street-based city centre portion is not, due to the fact that it uses public roads and has just the one bus-only lane per direction. Furthermore, even if the busiest routes were converted to light rail there will still be many other bus routes which would remain as bus services and building an underground busway through Ottawa city centre has been deemed to be prohibitively expensive.

As an aside, Ottawa has been trialling the use of light-weight trains (as used extensively in Europe) as a prelude to a probable light rail line, but this is being seen as an option for a different transport corridor.

USA.

For many years Pittsburgh has been acknowledged as making the most extensive use of bus-only roads in the USA, although with ever increasing traffic congestion recent years have seen some other US cities have also started to build BRT systems too.

In all Pittsburgh's system comprises of three separate sections of busway. The 4.3mile South Busway is said to be the oldest operating busway in the USA. It is used by 16 bus routes which serve 9 bus stops. The West Busway is five miles in length, is served by 11 bus routes and features six stations. The Martin Luther King, Jr. East Busway was built in two stages and now totals 9.1 miles in length. It is used by 34 bus routes, of which 31 are express routes that circulate within many communities and then benefit from a non-stop, traffic-free commute into Pittsburgh city centre. There are nine bus stations plus one bus stop. A distinctive feature of the MLK Jr. East Busway is that much of it is located alongside a very busy heavy rail right of way where the train and bus are separate but share the same overall transport corridor. Pittsburgh's system also includes several tunnels, including former railway tunnels now used by buses and a tunnel where the buses share a right of way with light rail services. Alas not having personally visited Pittsburgh and with there not being any copyright-free images of its busways on Wikipedia so at the present time it is not possible to show images sourced from here.

Whilst some of the other American BRT systems include sections of single carriageway bus-only road there are several systems where the buses use HOV (high occupancy vehicle) lanes on the normal highway which are restricted to vehicles with two (or for some locations three) or more than people in the vehicle.

See caption for picture information. Mt Washington Transit Tunnel Pittsburgh is shared between (driver steered) buses and the light rail.
Image courtesy of Bruce S. Cridlebaugh.

Click image or this link http://pghbridges.com/pittsburghW/0584-4475/mtwashingtonPAT_tun.htm to visit the website for more information and a larger image.

Another of the USA's high-profile BRT services is the Metro Orange Line in Los Angeles, California. Named after the many citrus trees that once blanketed the San Fernando Valley, this is Metro's only bus service which has a 'colour' name, although it is also known as route No. 901. Because of its special status the Orange Line is also the only bus service to appear on the Metro Rail System Map which depicts the region's network of light and heavy rail (steel wheel) transports.

The reason for the Orange Line's special status is that from the outset it was designed with many of the characteristics which usually feature on a (steel wheel) light rail system, such as a dedicated right-of-way, stations spread further apart than is usual for local bus services (typically one mile apart), platform ticket machines for faster boarding, park-and-ride facilities and other amenities. Part of the Orange Line's route was a conversion of a former railway, although as some of these images suggest, there is also some street running too.

The Orange Line also has its detractors, especially from the pro-light rail lobbies, who point out that in less than a year of operation the "Orange Line" busway pavement (ie: 'road surface' in British English) has become seriously rutted, deteriorated, and uneven, producing rough, uncomfortable riding quality for passengers and more wear and tear on buses. They also point out that by way of contrast, railway tracks tend to retain durability and smooth riding qualities for much longer.

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Typical station architecture seen at North Hollywood Orange Line Station. A Metro Liner bus (with bicycle rack) at North Hollywood Orange Line Station. This photograph, copyright (C) Cian Ginty.
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Side view of the NABI 60-BRT at Warner Center Transit Hub. Inside one of the Metroliner buses.
These Metro Orange Line images were sourced from the free online "Wikipedia" encyclopædia. Clicking them will open larger version in new windows, alternatively clicking this link will open up the Wikipedia page dedicated to the Metro Orange Line (also in a new window) where more information and images can be found. http://en.wikipedia.org/wiki/Metro_Orange_Line_%28LACMTA%29

Transantiago: A Disastrous implementation of a BRT System.

It is important that new high profile transport systems are implemented with the primary aim of adding value to the lives of the people who will use the system. Whilst no doubt this was the intended aim it is unfortunate that severe teething problems with the implementation of the Transantiago system in Santiago, Chile, has seen the very opposite result, with many commuters finding that the ending of through buses between their residential areas and places of work has resulted in journey times doubling.

The matter is highly contentious, but judging by comments from various media sources (including specialist bus transport media) it seems that the system was started prematurely, without construction of the BRT infrastructure (bus lanes / bus stops) having been completed and without there even being enough buses to carry the passengers who must now travel on 'feeder' buses from their homes to the metro or Transantiago BRT bus stations, where they need to change vehicles to complete their journeys. Apparently not only has the inconvenience resulted in significant public disturbances - with as many as 830 people arrested at one disturbance alone - but also because so many people have been constantly arriving late for work February and March 2007 saw the country's economy suffering lower than expected growth. As ever it seems that the people suffering the most are those living in working class areas, which suggests that the implementation of the new system was made without enough regard to the needs of many ordinary working people.- ie: the people upon whom the economic well-being of the entire nation depends.

The following text is dated to 1st July 2007 and comes from the English language page of the "Wikipedia" encyclopædia. It is hoped that this disastrous situation will improve 'very soon', and that other cities will take note to avoid similar situations arising. http://en.wikipedia.org/wiki/Transantiago.

Transantiago is the public transport system that serves Santiago, capital city of Chile. It was introduced on February 10, 2007, replacing the previous chaotic system run by thousands of independent bus operators. The system works by combining local bus lines, main bus lines and the Metro (subway) network. It includes an integrated fare system, which allows passengers to make bus-to-bus or bus-to-metro transfers for the price of one ticket, using a single contactless smartcard.

Transantiago's implementation has been problematic. Some of the bus companies have not put out the required fleet in operation, making the bus headway irregular and generating large crowds and long queues outside Metro stations and bus stops. The fleet management software (which includes the use of GPS) has not been implemented. Segregated bus corridors have also not been constructed and "paid zones" have been improvised. The lack of trust by users in the bus system has overcrowded the Metro. There is also criticism of a lack of line coverage in the city's peripheral areas, which were well covered under the previous system.

Transantiago has also spawned Chile's largest class-action suit, as when a community leader discovered the new transit system did not run to his old place of employment - forcing him to change jobs - he united some 800 other commuters who had suffered similarly in an action claiming damages of US$38,000 each. In what is being seen as an intelligent and civilised way to protest (instead of just rioting), the legal action is not being done to become wealthy, rather it is about getting respect. The Chilean constitution assures the Chilean people of a right to be able to live in dignity and in a clean environment, and under Transantiago this is not happening.

Although the focus is primarily on the transports per se - and not BRT as a transport technology - the following two links lead to pages with more information about South American and European enhanced high-capacity bus systems. Curitiba in Brazil , New-era High-tech buses..


Bus-only Roads in the UK.

Although Brazil is said to be the first country to have a reserved lane busway system in a large city, the town of Runcorn, Cheshire, can claim the invention of this method of transport.

Runcorn was one of the post WW2 'new towns' which was built around an existing rural community and unusually for the UK the provision for a bus-only road network was included in the design blueprint. It is 14 miles [22km] in length and is shaped like a 'figure-of-eight' so that it serves most of the town's residential & industrial and 'crosses' at the town centre, where there is a short elevated section of busway. Housing and employment locations are distributed such that 90% of the working population is within a 500-metre or five minute walk of the nearest bus stop, with the stops being about ¼ mile apart.

The busway is mostly one lane each way and apart from a section of a couple of miles to the west of the town is fully segregated from other traffic. The road widens at bus stops to permit overtaking.

Many people see buses as having a 'down at heel' image, being solely for those people whose transport options will not extend to anything else. The Runcorn busway has not helped in countering this perception, as it has been subject to extreme vandalism (especially at bus stops) and general neglect. This helps explain why many promoters of other British BRT systems are so keen on being proactive in trying to create and maintain high quality transport operations. As they know, whilst very desirable, congestion free private rights of way are not the whole story.

The North Kent (Thameside) Fastrack.

Commencing services on Sunday 26th March 2006 'Fastrack' is a British based BRT system which is based on the creation of brand new bus-only roads, although in places it also uses the ordinary public highway (depending on where - with and without bus lanes). Ultimately planned to feature four routes, 'Fastrack' links several towns and other major traffic destinations just south of the River Thames in North Kent, this being an area which the national government would like to see benefit from greater development as a way of reducing the pressure for residential building in London. What happens to areas alongside the River Thames when global climate changes results in sea levels rising is a different issue.

The ethos behind Fastrack is to provide a transport of a quality that is midway between the train and the bus (ie: 'better' or 'higher' than a normal bus service - more like a tramway) so there is a strict ban on any other bus services from using the newly constructed dedicated bus-only roads. This ban even extends to London's famous red buses which serve the nearby Bluewater shopping centre. One reason for the ban might be because under the British system of bus deregulation this is the only way that the system's backers can control the quality of the vehicles being provided. (The London buses can be banned because Dartford is in Kent, which is outside of the protected 'London' bus area).

In its initial stages Fastrack uses normal single deck buses which were bought by Kent County Council with funding from the Office of the Deputy Prime Minister’s Sustainable Communities Plan. It is anticipated that as traffic increases so higher capacity (and possibly distinctively styled) articulated buses will become financially viable.

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Primarily serving the towns of Dartford and Gravesend as well intermediate communities plus the Bluewater shopping centre and the Channel Tunnel Rail Line station at Ebbsfleet, the North Kent (Thameside) 'Fastrack' bus service is an outer suburban / regional system which includes many high quality BRT features - but unlike a comparable BRT system in West Sussex eschews kerb guidance for its private bus-only dedicated right of ways (see below).
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The sign under the traffic signal on the left reads signals triggered by tagged buses only. No doubt this is to help deter other buses from using the facilities intended for Fastrack.
However, despite being a tagged bus the wasted time spent waiting for the traffic signals to change meant that it would still have been faster to enter the roundabout via the normal carriageway - and not the bus lane. (Seen off-peak, when traffic was minimal).
Waiting for a green traffic signal at the entry / exit point just outside Dartford town centre.
The inset shows how the bus lane sign includes the word 'local'.
At some locations there are additional plates which quite clearly specify that the bus-only roads are restricted to Fastrack buses only.
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Calling at a bus stop on one of the sections of private bus-only road. One side effect of prohibiting ALL other buses is that the London (red) bus route number 96 which travels non-stop between Dartford and the Bluewater shopping centre must do so on the sometimes congested public highway - note the same traffic direction sign as in the view directly above.
A Personal Opinion

These comments may not be what some transport industry professionals, transport planners, transport operators, politicians or transport advocates (lobbyists, etc) want to hear but it is what they NEED to hear, and hopefully bear in mind.

It is understood that back in the 1990's a Fastrack type scheme was mooted to use light rail / trams, however no doubt knowing how the British govt. is so very keen on buses as a solution instead of trams so this is why the system has ended up as a rubber-tyred system. However it is still a matter for conjecture why, if the planners had been really serious in wanting something 'better' than an ordinary bus (which is effectively what the buses used here are) then why did they not adopt the one solution which would have retained the same 'clean air' attributes which so many advocates suggest is one of the tram's primary features?

This would have been achieved by using trolleybuses. With trolleybuses Fastrack would have been making an environmental statement showing how buses really can be as clean as both trams - and the 3rd rail electric trains in North Kent. This would also have had the positive side effect of creating a true BRT showpiece which would have boosted the public's view of entire British bus industry.

It is also a matter of surprise that given the strong desire to control which vehicles access the bus-only roads (and despite the systems' Fastrack name which sort of implies a fixed infrastructure track or roadway) these are just ordinary roads, albeit with a local buses only restriction - and not kerb guided busways, a solution which would have also physically prevented unauthorised access and provided a physical symbol that also demonstrates a long term commitment to the bus service - as described below

Elsewhere in Britain

A 'North Thames' counterpart of Fastrack is proposed for the Thameside regions in South Essex. Provisionally known as SERT (SouthEast Rapid Transit) it is led by Southend-on-Sea Borough Council, Essex County Council and Thurrock Council on behalf of Thames Gateway South Essex partnership, which is masterminding the regeneration strategy for Thames Gateway South Essex. With global climate changes and the possibility of sea levels rising in mind the wisdom of encouraging people to invest / live in a coastal area beggars belief. OK, this is not (yet) a transport related issue.

In Swansea, South Wales a 10 vehicle fleet of the pink and purple livered StreetCar buses is being introduced on a high profile BRT system. Expected to cost £14 million the proposals are to create a tram-like 'high quality bus network' which will use a mix of private right of way and shared use of the public highway, including some bus lanes, High Occupancy Vehicle (HOV) lanes plus, where required, other bus priority measures. Marketed as the Swansea Metro this BRT scheme is a partnership between the City & County of Swansea and First Cymru Buses. It is being funded by the Welsh Assembly Government and the European Objective One programme. To avoid too much duplication the StreetCar buses are looked at in greater detail on the Hi-tech New-era Hi-tech buses page.

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Originally constructed to act as part of a high profile government-sponsored 'showpiece' BRT system where the buses used an innovative self-steering technology based on the premise of being guided (steered) by twin cables buried under the road surface, London's former Millennium Dome Busway now operates as an ordinary bus-only road. Because of the frequent long delays spent sitting at red (stop) traffic signals at each end - and (often) along the busway too - for most journeys the passenger experience of this busway is one of Bus Tedium Transport rather than Bus Rapid Transport.

The innovative guidance system is more fully looked at further down this page.
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Kerb Guidance - The 'O-Bahn'.

This is a very much condensed version; more information and many more images - plus some maps - can be found on this page which will open in a new window.

Close up view of a guide wheel.
The buses' road-wheels use the road surface, and the guide-wheels run along the inside face of a raised kerb
(as seen on a British guided bus).
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A kerb-guided duo-bus calling at a stop located in the median of an urban motorway.
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A kerb-guided duo-bus calling at a stop located in the median of a dual carriageway elsewhere in the city.
View out of bus front window.
Waiting for the signals to change. The wait can often seem interminable and as a result if there are two buses here they often go through in convoy.
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Guided duo-buses in electric mode, sharing formation with trams in Essen city centre. In 1991 this location was replaced by a new extension to the tram tunnel system.
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The first tunnel section of tunnel operation saw buses calling at Porscheplatz station where they shared the centre two tracks with the trams.
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The extension to the tunnelway saw kerb guided duo-buses calling at two more intermediate stations, where they used their off-side doors.
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A driver steered bus using London Underground style 'tube' tunnels in Seattle's bus subway.
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Mannheim, Germany. A guided bus passes a 'level crossing' while a non-guided bus waits to cross.
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Two views of Adelaides' Northeast Busway.
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Kerb guidance is an off road technology which involves the creating of private rights of way (for buses) using a special trackway physically removed from the public highway. The first public kerb guided busway (KGB) opened in Essen, Germany in 1980, where the KGB system is usually referred to as "O-Bahn" although the terms "Bahnbus" and "Spurbus" are also used.

The KGB trackway is similar - in theme - to conventional railway tracks except that instead of being designed for flanged steel wheeled trains / trams / streetcars it is designed for rubber tyred road vehicles. Essen's first installation features parallel sets of 'L' shaped prefabricated concrete panels which are 10m (metres) in length and laid 2.60m apart (as measured on inside vertical faces). For curved sections of trackage (guideway) the panels were gently bent as required whilst being laid. They are supported every 1.35m by sleepers to which they are fixed by means of fishplates and clamps. The sleepers are wide enough for both direction's tracks and are mounted on to concrete bore piles which act as the foundation. To make it easier for buses to enter the trackage the entry points are fitted with steel box girders which funnel in from 3.50m down to 2.60m.

Kerb guidance uses ordinary buses (motorbus, trolleybus, etc,.) fitted with two horizontal guide-wheels (one per side, mounted immediately in front of the front road wheels) which steer the vehicle via guide-arms attached to the steering knuckle. The buses' road-wheels use the bottom leg of the precast panels, and the guide-wheels run along the 18cm (approx 6") high upstand edge. Sometimes additional touch-wheels are fitted next to the vehicles' rear wheels, (plus, on articulated buses, centre wheels) - these are not in continuous contact with the guideway but are needed for curves. Whilst on the track the driver retains full control of the vehicle except that (s)he no longer needs to use the steering wheel! Away from the track the bus uses the normal road, just like any other rubber tyred road vehicle.

The reasoning for mechanically guiding buses is that the resulting dedicated busway uses less space (land width) so can be much narrower than a driver steered busway. To allow for driver-steered buses to "wander" sideways slightly and still pass safely when travelling at even a moderate speed an ordinary two lane road needs to be at least 7,5 - 8 metres in width. However for guided buses the lanes only need to be a little wider than the buses, so for standard width buses of 2.5m (or 2.55m) the total width required for a two-way busway will be only 6m. The resulting saved space can make a significant difference when trying to shoehorn a dedicated bus lane in to a narrow strip of land.

Essen's O-Bahn system was part of an experiment in bus transport started in the late 1970's whereby the (West) German Government Federal Ministry of Research and Technology funded a developmental project to perfect two recent German designed innovations in bus transport - the 'self-steering' kerb guided bus and the twin system 'duo-bus'* - by means of a phased programme of testing and evaluation over two (later became three) quiet suburban private rights of way which, if successful, could eventually be linked up via the city centre to provide a 'dual-mode-bus' demonstration system. (*For more information on duo-buses see the electric buses page; scroll down about halfway.)

The rational behind the experiment was that over recent decades Essen, like many other (West) German cities, had followed a policy of upgrading metre gauge street tramways into standard gauge light railways and in congested city centres relocating both modes into underground tunnel systems. Its buses however remained on the surface, and as might be expected at times of peak traffic flow the delays often caused considerable disruption to services. Having built expensive infrastructure for the steel wheeled transports it was felt desirable to try to maximise the benefits of that expenditure by extending the buses through the tunnels too.

click me for video Click the projector icon or this link http://www.youtube.com/watch?v=lKZGKA2Bk4c to watch a six minute video of a guided duobuses in Essen. This includes parts of the Kray and the phase 1 (pre 1991) tunnel section and uses footage sourced over several visits in both summer and winter.

Underground busway services have now ceased, this is because after just a few years the experimental wooden trackage became life-expired and with the ending of the developmental programme the funds are no longer available to replace it. However virtually all of the rest of the O-Bahn is still in use. In September 2001 the special duo-buses were withdrawn from service, having spent most of their lives operating as motor buses they were now deemed to be 'life expired'. They were replaced with low floor motorbuses.

Kerb guidance offers a transport operator a system that - without compromising the limited available roadspace - can help its buses avoid traffic congestion and therefore provide a more reliable service to their passengers. The possibility of tunnel operation shared with light rail services makes for added cost effectiveness because where vast amounts of money have been spent on putting rail systems underground it would now be possible to further increase the benefits of that expenditure by allowing the buses to join them. In the event, as yet no other city sees such shared tunnel operation, indeed the very existence of subterranean bus services is still very unusual - perhaps the oldest example being the short tunnel and station at Harvard in the Greater Boston area, USA. Also in Boston, the "Silver Line" Bus Rapid Transit route includes some sections of bus subway. Apart from Boston there are only a handful of examples; perhaps the most significant of which is in Seattle, USA (see below). Two of the others are in Japan. These form part of the Tateyama - Kurobe Alpine Routes and see trolleybuses using single - track tunnels where services often run in 'flights' with several vehicles travelling together in groups with one of the lines being controlled (signalled) using railway style tokens and the other on the basis of buses starting when the signal is clear and the number of vehicles being counted as they depart. However, as these services are tourist-orientated and not part of a 'serious' urban transport solution their status is somewhat different.

The Seattle bus subway is wholly located within the city's 'free travel' zone, which means that so no fare is required at any station during hours when the policy is in effect. Opening in September 1990 and 1⅓rd mile (2.1km) in length it features 5 stations which open on Mondays - Saturdays only. Services were originally provided by a fleet of Italian duo-buses, with some routes providing a direct link to the city's airport.

At the time of construction rail tracks were also installed for a future light rail service. Unfortunately despite this commendable forward thinking it was subsequently decided that part of the light rail line will follow a different alignment than the existing tunnels, so on 24th September 2005 the bus subway was closed for a two year period of rebuilding. Most of the duo-buses were actually withdrawn in advance of the closure, and (amazingly) replaced with diesel powered buses. In April 2005 local users were reporting on some Internet discussion groups that the tunnels were often somewhat smelly from (what thinking people know to be) the carcinogenic diesel engine exhaust fumes. Whilst it is true that the buses are hybrid diesel-electrics and when underground operate in a special low power 'hush' mode they still need to use the fossil fuel traction package whilst underground. Apparently the choice of fossil fuel buses is influenced by the transport operators' belief that it is not possible (or not safe) to mix overhead wire powered light rail and electric trolleybuses / duo-buses in an underground tunnel system - even though Essen proved otherwise!

Now known as the Downtown Seattle Transit Tunnel it re-opened exactly 2 years later (on 24th September 2007). At present it remains a bus-only tunnel, however shared use with the light rail is expected to begin when the light rail system opens in 2009. The works included lowering the tunnel floor (road surface) for the light rail and this has led to concerns that the bus mirrors (which are now at head height) may strike people waiting on the platform. In an effort to prevent this the mirrors have been equipped with flashing lights. Another change since the tunnel reopened is that the speed of the buses has been lowered from 15mph to 10mph.

However, none of these Japanese and American bus subways see buses using kerb guidance. It might be assumed that for safety's sake "some" sort of system would be needed - if only to reduce the chance of a bus accidentally hitting the tunnel wall - especially where they use narrow London Underground 'tube-like' tunnels??? But this seems not to be the situation.

Apart from Essen the only other German city to have used the kerb guided O-Bahn system was Mannheim, where buses shared a pre-existing surface light rail private right of way. Installed in April 1992 this 800 metre installation helped city-bound vehicles to bypass traffic congestion leading up to a busy traffic signal controlled junction in a location where there was no space for an extra traffic lane. (Out-bound vehicles use[d] the public highway). As the view of two buses at a traffic signal controlled 'level crossing' along the route demonstrates, even though they were buses the tracked vehicles used to receive precedence over other vehicles that wanted to cross the line. In September 2005 guided busway services were withdrawn from here when the majority of buses fitted with guide wheels were decommissioned for age reasons, and it was decided not to adapt their replacements.

Since first section of Essen's demonstration systems began passenger operation in 1980 the Germans have clocked up only one overseas sale. This has been to the Australian city of Adelaide, which is the state capital of South Australia (S.A.). Originally planned as an extension to the Glenelg Tramway, the decision to use kerb guided bus technology comes from change of governing political party after state elections. Interestingly S.A. is noted for its large ethnic German population.

Services here are of an 'outer suburban' nature with the busway acting as a high-speed corridor from which the buses 'fan out' to serve low density suburbs. Some services enter / leave the system at one of the intermediate stops. The original idea was to offer all passengers direct services between the suburbs and the city centre without having to change vehicle en route, however, this proved to uneconomic so especially at quieter times some bus services act as local "busway feeders" and pasengers heading for the city centre must change at the busway 'stations' to complete their journeys.

Apart from Germany and Australia the only other kerb commercial guided busway 'anywhere' globally (outside of Britain) is a single 6.5 km (4 mile) line in Nagoya, Aichi, Japan. This is an elevated system that is served by five bus routes which are operated by three different bus companies. Away from the guided section the buses use the normal roadway. There are nine 'stations'. As with the many Japanese monorails or automated guideway transits the line is legally considered as a sort of railway.

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Look! Hands-free steering!.
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For most of its length the busway speed limit is 100km/h (about 62 mph - the Aussies have gone metric). The line is unsignalled and especially in the rush hour it is quite normal to see buses running in convoy - they are supposed to keep at least 150 metres apart. South Australia is well known for having exceptionally enthusiastic and pedantic policing of its speed limits (with revenue generation being a stated aim) and radar speed traps have operated on the busway too.



Guided Buses In Britain.

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Tracline 65 bus stops platforms were designed for single-door buses, requiring accurate stopping by bus drivers. The sign asks passengers to stand clear of the edge when a bus approaches, partly for safety but presumably also to allow alighting passengers to pass first.
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Ipswich: A view looking along the busway from the Ipswich end. Being only 200 metres long it takes just a few minutes to walk its entire length!
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North Leeds: Bus calling at stop on Scott Hall Road.
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The East Leeds system includes both single and double track sections of busway. However because only some buses use the guided busway all bus stops are also duplicated at the kerbside.
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Bradford's busway has several of these 'super stops' which feature wind turbine powered electrically heated seats!
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Traffic signals allow vehicles turning right to cross the path of a road-centre guided busway in safety.
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Selby Road features a short inbound busway which ends shortly before the road narrows to pass under a railway bridge (seen in distance).
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Special traffic signals with twin converging white lines instead of a green lamp help prevent other road users confusing their signals with those dedicated to the buses.
See caption for picture information. Birmingham Tracline 65 kerb guided bus at a bus stop.

Clicking either of the two Tracline 65 images will lead to a dedicated page showing more (and larger) images in a popup window; alternatively clicking here will open the page in a new full-size window.

See caption for picture information. Because not all bus operators have fitted guide-wheels to their buses some buses must continue to use the public highway.

It is well known that most car drivers see motor buses as slow, utilitarian vehicles that are constantly stopping, and if caught in traffic these motorists would very much prefer to be sitting in their cars listening to their stereos rather than in a bus! Even the bus companies admit (albeit only in private) that as a mode of transport buses have a 'down at heel' image. As a contrast modern trams are seen as sleek, sophisticated, rapid, comfortable, clean and fume free, in fact everything that efficient rapid transit needs to be. So if buses are to achieve their full potential then there is a need for them to be seen in a light similar to the trams. To be kind to the drafters of British bus deregulation and privatisation this is probably what they had hoped would have happened. The reality was, and in many places still remains, very different.

Trams often have their own private rights of way which enables them to bypass congestion, and for Britain the idea behind most of the kerb guided bus schemes is to emulate that feature. The thinking is that if 5% of a bus's route takes 20% of its journey time, then investment should be made on that 5%, elsewhere the bus can use the normal road. If, later, congestion worsens then more trackage can be constructed on a 'as required / available space basis'. With guided buses the trackage can be installed almost anywhere, even places that would otherwise be too narrow for 'driver steered' bus lanes.

As with ordinary bus lanes kerb guidance trackage can be available to almost any eligible vehicle, all the bus operator has to do is fit guide-wheels to its vehicles and make sure its drivers are properly trained! - because of the special driving techniques required (how to enter and use the busway and the importance of not hitting the kerb with the guide-wheels when driving on the normal highway) the British government has made it a criminal offence for untrained drivers to drive guide-wheel equipped buses, whether on the busway or ordinary road.

Whether the inspiration behind the development of kerb guidance in Britain was copied from the Germans is not known, however whereas Adelaide's busway uses technology purchased from Mercedes-Benz the British systems use British technology.

The first British line opened in 1984 in Birmingham, again as part of what effectively was an experiment in bus transport. The larger picture was to see if by a program of concentrated improvements along a specific route that led to faster journeys and a generally higher quality of service to passengers it would be possible to attract more people to bus transport. The guided section of Trackline 65 was just a 600 metre strip at the very end of the route in an area where traffic congestion was not an issue; elsewhere new bus lanes were created, parking restrictions introduced / stiffened, more and better bus shelters erected and there was much media publicity. As far as guided operation was concerned the experiment was always meant to be of limited duration and closure came in 1987 when following bus deregulation a rival bus company won the contract for the Sunday service and with it not willing to spend money equipping vehicles with guide wheels the situation arose whereby there would have had to be different stops (on the parallel dual carriageway) for different days of the week.

Forwards view out of top deck of a bus which is stuck in traffic.


A typical scene in Britain (as seen from an upstairs front window on a double deck bus) - a dual carriageway in sore need of bus priority measures.

'Ordinary' bus lanes would not be appropriate here whereas kerb guidance would provide an optimum congestion-busting solution that would not be open to abuse from other road vehicles.

Since 1995 six guided bus installations have been opened in Britain, three in Yorkshire (North and East Leeds plus Bradford) as well as one in a village near to Ipswich, one in the Crawley / Gatwick Airport area and one in the Scottish Capital City of Edinburgh. The latter also features what at 1.5km is - so far - the longest section of continuous guideway in the UK. More are planned in other British cities, ranging from Leeds style 'congestion busters' to Adelaide style 'outer suburban / long distance'. It is expected that they will use guidance as part of a wider package of 'overall corridor enhancements'. This is very important as it is not good enough to just bypass traffic queues - a tatty vehicle with poor internal fittings simply will not provide an attractive alternative to either a comfortable motor car or a rail journey. This explains why there is a constant concern among the 'quality bus' operators that if a 'cheepo' bus company was to equip its vehicles with guide wheels it would undermine their efforts to prove that bus transport can also be quality transport. In the cut-throat competitive world of bus deregulation there is nothing to prevent this from happening, except perhaps the ability of a company to afford the initial outlay.

Perversely the opening of the Bradford guided busway was accompanied by a 25% reduction in the parallel road's speed limit (from 40mph to 30mph). Unfortunately this creates the impression that faster, better & generally more attractive bus transports can only be achieved if car travel is made slower and less attractive. This lunacy suggests that the transport planners have fallen prey to the Luddite anti-car ideology of "lets screw the motorist in every which way we can" instead of following what is the only true solution to traffic congestion - this being improving the public transports in their own right so that those people who have a choice (ie: car users!) will see them to provide positive alternative choices to driving.

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The Sussex "Fastway" Bus Priority scheme includes some guided busway with a special emphasis on "congestion busting", for instance to get past traffic signalled junctions, as seen here. (Many road users would suggest that too frequently the traffic signals are the primary cause of the congestion the guideway has been installed to by-pass). These images show one of the system's shorter lengths of guided busway - at the time of taking them (spring 2004) much of the system was still to open.
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These images date from spring 2006 when much more of the system had been completed. They depict another congestion busting aspect of the Fastway system, this being where the buses that use a section of guided busway which is located in the median of a dual carriageway and ends at a roundabout are given a special lane through the centre of that roundabout.
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The West Edinburgh Busways (WEBS) "Fastlink" busway.
A bus on route 22 heading towards Edinburgh City Centre passes the special road sign as it joins the busway.

Behind the bus can be seen a ramp leading to a bridge over a local road - the guided busway by-passes several roundabouts and uses high-level bridges to pass over some of the access roads.
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It is perhaps just as well that this busway has a rather low maximum speed limit of just 30 mph (50km/h) - this is because the buses seem to "hunt" (or wriggle from side-to-side) somewhat more than on some other guided busways

From a closer inspection of the inside face of the busway trackage (whilst waiting at the Broomhouse Halt East bus stop) it seems that the trackage might have been formed from concrete which was cast on-site, and that there might be slight corrugations on the inside faces of the raised kerbs - these being the surfaces which the guide-wheels use to steer the buses.
A traffic signaled pedestrian crossing at a guided bus stop. Both double and single deck buses serve this guided busway. The 20 mph (30km/h) speed limit applies whilst passing the bus stop - and is primarily aimed at buses which are passing through without stopping.

Image by Richard Webb, and sourced from the Geograph project collection (http://www.geograph.org.uk/photo/16352) (link to external site opens in a new window). Image is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license under which sharing and making derivative works of the file is permitted providing that it is appropriately attributed and only distributed under an identical license.

Govt. Approval & Funding For superCAM.

At the end of June 2006 it was announced that the govt. has approved the Cambridgeshire superCAM scheme and will provide a grant of £92.5m, with developers building homes which will be served by the buses being asked to contribute the balance of £23.7m.

Since first proposed the cost of this scheme has risen considerably - in 2002 it was estimated to cost £73m, which just 18 months later had rocketed up to £86m. The price tag at the time of its receiving government approval was an even more heavily inflated £116.2m, with general inflation and rising construction costs being cited for the significant upwards spiral.

Once completed the total length of this BRT system will be 25 miles (40km) of which about 14.5 miles (23km) will be guided with the 10.5 miles (17km) balance being on normal roads. This will make this the longest kerb guided busway anywhere globally. The contract to build the system has been awarded to the same construction company that built the Sussex Fastway system, however to avoid the potential for cost overruns Cambridgeshire County Council has drawn up a contract which makes the engineering firm primarily responsible for costs if the scheme runs over budget. It has been decided that for the best possible quality of ride on what for many passengers will be journeys of over 20 minutes in duration the guided section should comprise of Essen-style pre-cast concrete beams. 12 metres in length these are being manufactured locally in a specialist factory which was built for this purpose.

Construction began in summer 2007, in the process endearing the system to local people in ways which even 'out-does' the installation of a street-based tramway. In short, where the busway crosses roads (ie: at former railway level crossings) the roads are being closed for typically three (3) but at some locations as long as four (4) months... much to the erm 'delight' of local people. This excessively long time period could be said to not be the best way to make friends with the local communities; it is being done so that the concrete panels which form the road surface (minus the sidewalls, of course) can be laid on the crossings too, thereby ensuring that even at crossings the buses will benefit from the best possible road surface. The first buses should be running towards the end of 2008.

Initially four bus operators were set to run the services, however due to the very fluid nature of Britain's local bus industry this figure is subject to change. All bus operators will be expected to use low floor accessible buses which offer high levels of passenger comfort. Provisionally dubbed "superCAM" it is unknown whether the system will actually be promoted under this name. The first buses should be running towards the end of 2008.

It is unfortunate that (as with all other British guided bus systems) this scheme is set to fail environmentally. This is because whilst environmental friendliness is also a desired feature by opting for a motorbus system this is not possible. Compared to trolleybuses, which (like electric trams) do not give off any tailpipe pollution so motor buses can only ever be "less dirty", and never "clean".

The planning stages of this project saw significant very vocal local opposition, mainly because it is re-using a former railway line which was closed by Dr Beeching in the 1960's. Many campaigners were suggesting that instead of its bustitution it should be reopened as part of a strategic east-west railway route which would be served by both local passenger trains and longer distance freight trains. It was also suggested that the route would have been ideal for track sharing with light rail services which (as in some towns in Germany) could have been extended beyond the mainline into the heart of Cambridge city centre. Some people also pointed out that the mere need for this route for "any" transport use helps justify claims that Dr Beeching's closures were wrong and should be reversed at many other locations around Britain too. (Claims which are very difficult to refute). Pro-bus campaigners point to the ability of the scheme to serve more areas with through services than any form of rail service could provide and are not concerned about suggestions that many of the advantages of the dedicated right of way that the busway provides will be lost once the buses leave the busway and hit the very congested streets of Cambridge.

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Magnetic Under-Road Wire Guidance.

The kerb guided busway is mechanical in operation, ie: it requires physical contact with fixed infrastructure. An alternative to this is a system whereby otherwise ordinary buses are 'invisibly' steered by magnetically locking onto wires located just below the road surface. The idea is not new - it has been used in industrial applications for many years - but the transition to passenger transport has been very slow.

How It Works.

The basic premise is that a low level current is passed through a cable buried just beneath the road surface, and this generates a magnetic field which is detected by antennae located under the front of the bus. These antennae are linked in to on-board computers which control the steering via hydraulics specially installed for the purpose. The system is activated / de-activated by means of a simple press button so buses can switch between guided and non-guided operation while on the move however, at all times the bus drivers continue to control the vehicle's speed, and should the need arise can over-ride the automatic steering. If there is a fault both audible and visual alarms will activate, advising the driver to resume manual steering immediately.

The cable is powered by transmitters which would be required every 2-3 miles. These could be housed anywhere convenient, with perhaps anonymous nearby buildings being more secure (from vandalism) than roadside facilities. To ensure safety in case of power failure (which could lead to a sudden and catastrophic loss of guidance control - imagine for instance this occurring on a high-speed bend) the transmitters could be powered by an uninterruptible power source, similar to those used on burglar alarms and many computer systems.

Various countries have tested the technology at factory test tracks; in Sweden Volvo developed a version that was much simpler in concept than the others, and the opening, in 1979, of a small scale public installation meant that it became the first version to achieve passenger-carrying trials. Located in the south-western coastal town of Halmstad its purpose was to provide exact docking at bus stops, thereby providing level entry at a time long before the concept of the low floor bus had been thought of.

Just eight buses were involved, and in addition to the necessary equipment for the wire guidance they were also fitted with hydraulic plates which covered the steps (required for use at 'ordinary' bus stops without raised platforms) and formed a bridge to the platform edge.

In service both technologies worked, but the wire guidance was not an overriding success because it seems that many of the drivers did not quite trust the electronics and being concerned about what they saw as the near certainty of colliding with the platform often kept a grip on the steering wheel. As a result many of them developed shoulder problems. This problem was severe enough to cause the abandonment of the guidance facilities, (surely if they had been properly trained this situation would not have arisen?) but until the recent advent of low-floor buses the raised platforms continued to be used with the hydraulic plates continuing to ensure level access. (Sorry, no pics.)

In 1984/5 there was also a small demonstration system in the German town of Fürth, which is near to Nuremberg. However, it did not achieve the same acclaim as the rival O-Bahn demonstration system in Essen and is now closed. So far none of the originally planned 'serious' public installations have actually been built. (again, no pics.)

In 1996 there was also a trade demonstration installation in Newcastle Upon Tyne, which was designed to give the British bus industry confidence that the technology was viable, suitable for its intended purpose, and safe! Lasting for about two months they used an Optare Prisma bodied Mercedes-Benz 0405 citybus which had been modified by a Mercedes dealer (in Leeds, which is about 90 miles / 150 kms away! - what no Merc dealers in Newcastle??) and included simulated emergency stops, passing loops, 'S' bends, becoming guided while driving at speed, stopping at 'level entry' kerbside bus stops, etc.

These trials were successful; on attempting to steer the bus off-course drivers found that considerable effort was required to get it to deviate from its predetermined route, although there is a 'panic' button for emergency situations when 'instant' steering control might be needed; this is in addition to the main dashboard controls which are also required for switching between frequencies at passing loops and / or route bifurcation's. Experience also showed that under normal circumstances a modest speed of 50 mph (80 kph) could be achieved, one thing the technology is not designed to allow is reversing.

Not included in these trials was whether the system can cope with wintry weather, when roads can become as slippery as ice rinks - the question being whether the magnetics would be powerful enough to hold the bus to its predetermined course, or whether - in common with all other rubber-tyred vehicles - the buses will have to slow down to a snail's pace.

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Schematic showing how the system works.
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Rubber-tyred STTS vehicles in the service tunnel.

Both pictures sourced from a brochure issued by the electronic wire-guidance manufacturer.

The wire guidance system used here is by AEG (a Mercedes-Benz sister company within the Daimler-Benz group) and differs from the others because it uses two cables laid about 30 centimetres (approximately 12") apart. It is claimed that carrying the guidance signal in a parallel loop makes the system much more resistant to interference from surrounding conductors, such as structural steelwork. This system also features in what has become the first 'serious' use of electronic guidance for any form of passenger transport. This is in the service bore of the Anglo-French Channel Tunnel.

The Channel Tunnel consists of three independent 'tubes' about 50 km long which are linked every 375 metres by cross passages. The outer two each carry a single track rail line while the centre one has various functions including acting as the fresh air duct, carrying the drainage and other services pipework and being a 'safe haven' in case of emergency. Because of the length of the tunnels there is a need for some sort of powered maintenance vehicle and this is provided by a fleet of specially constructed Service Tunnel Transport System vehicles (STTS). It is these vehicles which use the wire guidance.

The reason for using any form of guidance system is that it provides the only safe way to maintain unhindered two-way operation of the rubber-tyred STTS vehicles within the 3.6 metre wide roadspace. Wire guidance was chosen after evaluating all the (then) possible alternatives, including kerb guidance, the GLT/TVR and a system that would have seen the vehicles steered by infrastructure fitted inside the tunnel walls. Originally narrow-gauge rail vehicles were proposed, they were rejected for a number of reasons including the extra expense of maintaining the fixed infrastructure - which to avoid a tripping hazard would have had to be sunk in the tunnel surface; the perceived danger of long braking distances either requiring the installation of some sort of signalling system or for 'driving on sight' mode the keeping to a low speed (surely tram - style magnetic brakes would have been an alternative solution?); and the inability to separate individual wagons and change the order easily - for instance, if an ambulance wagon is at the rear of the train it would be extremely difficult to detach it and pass it to the front. As a contrast with rubber-tyred vehicles it would be much easier to drive round the ambulance wagon, or if it was self-propelled for it to drive round the other vehicles.

The very restricted space within the tunnel meant that the STTS vehicles had to be of a novel design. Operating within a tunnel of only 4.8 metres diameter required that to reverse direction they could be no more than 3 metres long, which was deemed to be insufficient to be practical, so instead they are double-ended. For safety both axles are lockable, with interlocks preventing the engine from being started from the front cab if the rear axle is unlocked. Traction is via a 5 cylinder 3 litre indirect diesel engine and to ensure that the exhaust fumes are at an absolute minimum each vehicle is fitted with waste gas detectors. The choice of traction is somewhat surprising for a vehicle that operates underground but it was felt that the length of the tunnel was too great for battery power (the weight of which would also have considerably restricted the vehicle's payload) while overhead wire (etc.,) systems would have interfered with access to the various services in the crown of the tunnel. (Presumably LPG / CNG gas fuels were discounted for safety reasons, in the same way as private vehicles using these fuels are also prohibited from the car-on-train 'shuttle' services).

These vehicles do not carry fare paying passengers, rather they are specifically for services personnel, emergency services (fire and ambulance) and customs officials to use when travelling within the service tunnel. They are modular in design with removable central sections making them multi-tasking depending on the specific requirements of the day. In the event of a major incident train passengers would be evacuated from a stricken train into the service tunnel and then out via a rescue train located in the other rail tunnel, it is not intended that passengers would evacuate in the STTS.

Public Transport Demonstration System.

In 1999 a 1.3km section of wire-guided busway was built in London, this being intended to be a feature of the 'high profile' showcase bus routes serving the Millennium Dome, which was located on London's previously derelict Greenwich Peninsular. Note that although the Millennium Dome has now been renamed The O2 the previous name is being used here, as this more accurately reflects the structures' name at the time of the events being described.

The idea was to create a public demonstration system showing just how good bus-based public transport can be. As with the Dome the special bus services were enthusiastically supported by the national government, so there was no problem funding the 17 brand new vehicles required. These 12-metre East Lancs bodied DAF Bus SB220LF low floor buses were very luxuriously appointed featuring very comfortable seating, full air-conditioning, audio-visual passenger information systems and double-glazed Flyte bodies. In an attempt to enhance their environmental credentials three of them were LGP powered whilst the rest used ultra-low sulphur diesel. They were operated by Go-Ahead subsidiary London Central under contract to London Transport Buses.

Only one of the two special Dome bus routes was planned to use the guided busway and this service linked Charlton Connex SouthEast Railway Station with The Dome via a mix of dedicated busway and normal roads with enhanced bus priority measures.

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Two views from December 1999 showing wire-guided buses on test calling at a bus stop with a special railway-style 'raised platform' designed to provide level access.

The busway was formed of a special high resistance anti-skid block paving laid in a herringbone pattern, under which the guidance cables were invisibly fitted. Although this paving would have reduced the ride quality the short distance and low speed meant it would not have been a major issue. This choice of road surface was influenced by a desire to avoid 'rutting' - a common problem with bus lanes - caused by the vehicles' rubber tyres only using the same narrow strips of roadway. The busway included two stops with mini platforms offering level access with the bus.

Among the reasons for choosing to use under-road guidance technology here were:-

  • The ability to allow automatic 'docking' at bus stops to within 40mm of the kerb,
  • The ability to allow non-guided buses to use the same roadway, and
  • The ability to allow broken down vehicles to be passed without major disruption to services.

Apparently the original idea had been to use guided trolleybuses, or even trams, but because planning for the transport link was only started 16 months before it had to open it was deemed that there would not be enough time to comply with the cumbersome British legislative requirements for new 'fixed infrastructure' transport systems which involve overhead-wire. This is a most strange excuse because the Dome's promoters were able to obtain the required Parliamentary powers to get the heavily polluted land cleared and the Dome designed, built and opened all in a very short time scale, showing what can be done if there is a political will to do it. In Sweden the town of Landskrona has successfully designed, installed and opened a completely new trolleybus system in just one year from when the city council voted for it. What a contrast with the British planning process which encourages paralysis by analysis!!!

See caption for picture information. Overview of the wire-guided buses bus station outside the Millennium Dome.

The bus seen on the far left with its back facing the camera is calling at the pick-up point for passengers wanting to travel on route M1. Immediately behind is the drop-off point for arriving passengers.

'1' and '2' are where the roadway had to be widened (see below) whilst the red arrowhead points to the cabinets which contained the electrical control gear for the wire guidance system.

Erm, into Public Service?

The guided busway was expected to have opened to fare paying passengers at the same time as the Dome, (ie: 1st January 2000!) but whilst the special buses did enter passenger service (using the public highway) the busway remained closed for further testing. Unconfirmed reports suggested that the delay was caused by problems with buses 'touching' the platforms at the Millennium Village stop if they pass through at 'normal' speed without stopping. However on a visit early in February 2000 I saw some road widening / kerb realignment taking place near the terminus at the Dome where buses perform a right-hand 'u'-turn, and where the 'u'-turn area narrows (for the road to become just 'two lanes' wide again). Both sets of works were well fenced-in with heavy tarpaulin covering the wire mesh - presumably to hide what was being done. The photographs (left) were taken on a very windy day when some of the fences had been blown down. Much to my amazement when one of the workmen saw me using a camera he became very agitated, making it quite clear that he did not want me to take any photos; on attempting to speak to him (to ask him why 'no photos') he became exceptionally hostile and fearing for my own safety I left the area (in a hurry!). Such behaviour is more reminiscent of a petty official in a tinpot dictatorship than a nation that prides itself as a bastion of the free world.

These works were very close to the inconspicuous grey boxes where I had seen workmen tinkering a few weeks earlier - these boxes contain electronic control gear for the guided busway and the workmen were probably carrying out remedial works to cure some problems. The hostility shown to me was consistent with someone with 'something to hide' - perhaps the private consortia behind the guided busway had their 'backs to the wall' and were embarrassed that the system was not yet operational. It may also be significant that just days earlier the Dome announced disastrous attendance figures (in my view caused by exceptionally negative press reviews and the usual 'New Year' slowdown in the travel / leisure industry) and had to seek a £60 million 'short term loan', plus the Government had replaced the boss of the company that runs it with someone from the Disney (Mickey Mouse, etc.,) organisation.

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Two views of widening works in progress. Both images come from position '1'.
Just visible in the view on the right are some tyre marks which show just how close the buses' wheels came to the kerb before the road was widened.
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Passing position '1' after the works had been completed. A bus at position '2' leaves the bus station and heads back to the main part of the busway and Charlton Station. (Seen whilst under test).
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Summer 2000. With the busway still closed for testing a bus calls at the "set down platform" at the Millennium Dome terminus demonstrating just how closely the 'drive by wire' technology can dock a bus to the kerb.

Even after these works the busway remained out of use and by September it was announced that 'insurmountable technical difficulties' had forced a 10-12 month postponement of the plans for the buses to use electronic guidance. It seems that some new parts were required, and the delay was caused because it would take this long to design, manufacture and install them.

By December the scheme had been quietly shelved. The Dome (which had been intended as a focus for the nation's celebrations for the year 2000 and together with its internal exhibits was only just completed 'in the nick of time') had been a financial disaster with attendance figures about half of the original estimates, and whilst the bus demonstration system had only been partially realised a new tram / light rail line that had opened during the year in Croydon was proving far more successful than either the Dome or its bus services. As much as anything the exceptionally hostile press reviews (probably caused by the 3 hour delays many invited guests - including many newspaper feature writers and editors - suffered on its opening night) were to blame for poor attendances, as it seems most of the people who actually visited it were impressed by what they saw. (The Expo 2000 in Hannover, Germany was also a technical success but financial failure).

One unexpected problem for the guided busway (virtually a final nail in the coffin) was that Her Majesty's Railway Inspectorate (under whose jurisdiction new 'fixed infrastructure transports' - including all types of guided bus technology - now comes) started to apply the same gold-plated very demanding safety criteria that they use on the railways. Of particular concern here was what would happen in the event of a sudden failure in the guidance system, and whether such a failure would be to 'safe' (ie: retain some sort of guidance or automatically stop before 'derailing' and without the danger of a vehicle behind crashing into it) or 'danger' (ie: guidance fails and vehicle is unsteered until the driver retakes control). With road transports most failures are to 'danger'!

Now the Millennium celebrations are over Transport for London have published proposals to use this busway as part of a regional transport system (provisionally called Waterfront Transit) that will link both sides of the River Thames via public transport only lanes on a new bridge. If these proposals come to fruition they may even feature articulated trolleybuses / duo-buses or trams (the whole route was built to meet tramway standards regarding curves and gradients). We shall see... One thing is certain however, having had its fingers well and truly burnt under-road wire guidance is not on the agenda.

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April 2001 and the never opened busway is being dismantled. The would-have-been 'guided' busway has now been rebuilt and is being used by ordinary local buses in 'driver steered' mode.

Repercussions.

Following the total abandonment of the wire guidance on the Dome busway the Riverside Transit scheme in Newcastle-Upon-Tyne has opened using driver steered Designline diesel-electric hybrid buses sourced from New Zealand. Hybrid buses are looked at on another page.

In London the proposed use of wire guidance on the East London Transit bus scheme which would have seen wire guided trolleybuses using the public highway, has been demoted to become little more than a high profile conversion and possible extension of bus route 369, retaining the use of ordinary driver steered motorbuses.

A Personal Opinion

This comment will not be what some transport industry professionals, transport planners, transport operators, politicians or transport advocates (lobbyists, etc) want to hear but the reality is that whilst the choice of motorbuses and electronic guidance may have been very 'politically correct' for part of the transport system serving the Dome it did not enthuse the public in any way, shape or form and hence will be another reason why the Dome failed to reach its full potential as a tourist-orientated destination.

The reality is that bog-standard motorbuses do not have the necessary 'persona' to attract car drivers to switch to them - otherwise modal shift would have been achieved years ago! This explains why there is so much interest in the distinctively styled New-era Hi-tech Buses that retain the 'go anywhere' flexibility for which buses are renown but are styled to look more like trams.

See caption for picture information.
In summer 2003 the Swedish city of Lanskrona opened a new trolleybus route which had been planned, installed & opened within just one year of the politicians deciding to install it.

If they could do it then why couldn't similar have been done for The Dome's bus services?

Image sourced from the free online "Wikipedia" encyclopædia (link here)
(link to an external site which opens in a new window)
Route M1 should have been a tram service, as was featured at several Garden Festivals in the 1980's and the success of which was proven without doubt. There could have been a mixture of historic and modern tramcars with the tramcar manufacturers being invited to lend vehicles to demonstrate their latest designs. This has been done in other cities globally (eg Barcelona, Spain). Furthermore, because virtually all of the route of bus M1 was on brand new roadway the tracks could have been installed during the construction phase (very cost effective!) AND it would have been easy to ensure that no underground utilities would be under them (avoiding the major expense of their relocation which affects most new street-based tram systems). The issue of the voltage difference between modern and historic tramways could have been resolved by alternate day operation.

The other Millennium Bus route (M2) which serves Greenwich town centre should have used trolleybuses, which again could have involved a mixture of historic and modern vehicles. Special facilities could have enabled 'drive on the right' overseas trolleybuses to operate here in safety; after all, only a couple of bus stops were involved - not all of which were even on the public highway.

The implication of these comments is that the Dome would have been served by an environmentally sound 'all electric' transport system; a happy state of affairs which would have better demonstrated just how attractive (and clean) street-based public transport can be.

Furthermore the use of a mix of historic and modern electric transports would have attracted some of the global camaraderie of transport enthusiasts - whilst it may be that these people wear anoraks is it not also the case that they spend money??? No doubt some of them would have come with families and also visited The Dome.

Incidentally, whilst infrastructure for street-based public transports (overhead electric power supply wires and tram rails) usually require cumbersome long-winded planning permissions which take an eternity to achieve the mere fact that the government was able to get the legislation for the Dome enacted, the heavily polluted land cleared and the Dome designed, built & opened all in a very short time scale shows what can be done if there is a political will to do it.

October 2007 Update.

These views from October 2007 show that the former guided busway is now just an ordinary bus-only road flanked on one side by a road which is open to all vehicles. So although a quick glance may make it look like this is a normal dual carriageway it is actually two single carriageway bi-directional roads. As the images below suggest, sometimes the buses use both carriageways...and so do some private cars!

Althou