A bus lane or bus-only lane is a lane restricted to buses, often on certain days and times, and generally used to speed up public transport that would be otherwise held up by traffic congestion. Bus lanes are a key component of a high-quality bus rapid transit (BRT) network, improving bus travel speeds and reliability by reducing delay caused by other traffic.
A dedicated bus lane may occupy only part of a roadway which also has lanes serving general automotive traffic; the related term busway describes a roadway completely dedicated for use by buses.
The first bus lanes in Europe were established in 1963 in the German city of Hamburg, when the tram system was closed and the former segrated tram tracks were converted for bus travel. Other large German cities soon followed, and the implementation of bus lanes was officially sanctioned in the German highway code in 1970. Many experts from other countries (Japan among the first) studied the German example and implemented similar solutions. On 15 January 1964 the first bus lane in France was designated along the quai du Louvre in Paris and the first contraflow lane was established on the old pont de l’Alma on 15 June 1966.
On 26 February 1968 the first bus lane in London was put into service on Vauxhall Bridge. The first contraflow bus lane in the UK was introduced in King's Road, Reading as a temporary measure when the road was made one-way (eastwards to Cemetery Junction) on 16 June 1968. The initial reason was to save the expense of rerouting the trolleybus, which was due to be scrapped on 3 November of that year. However the experiment proved so successful that it was made permanent for use by motor buses.
Bus lanes may be located in different locations on a street, such as on the sides of a street near the curb, or down the center. They may be long, continuous networks, or short segments used to allow buses to bypass bottlenecks or reduce route complexity, such as in a contraflow bus lane.
Bus lanes may be demarcated in several ways. Descriptive text such as "BUS LANE" may be marked prominently on the road surface, particularly at the beginning and end. Some cities use a diamond-shaped pavement marking to indicate an exclusive bus lane. The road surface may have a distinctive color, usually red, which has been shown to reduce prohibited vehicles from entering bus lanes. Road signs may communicate when a bus lane is in effect.
Bus lanes may also be physically separated from other traffic using bollards, curbs, or other raised elements.
Peak-only bus lanes are enforced only at certain times of the day, usually during rush hour, reverting to a general purpose or parking lane at other times. Peak-only bus lanes may be in effect only in the main direction of travel, such as towards a downtown during morning rush hour traffic, with the buses using general purpose lanes in the other direction.
Entire streets can be designated as bus lanes (such as Oxford Street in London, Princes Street in Edinburgh, or Fulton Street in Downtown Brooklyn), allowing buses, taxis and delivery vehicles only, or a contra-flow bus lane can allow buses to travel in the opposite direction to other vehicles.
Some locations allow bicyclists or taxis to use bus lanes, however where bus or bicycle volumes are high, mixed traffic operations may result in uncomfortable conditions or delays. Certain other vehicles may also be permitted in bus lanes, such as taxis, high occupancy vehicles, motorcycles, or bicycles. Police, ambulance services and fire brigades can also use these lanes.
In the Netherlands mixed bus/cycle lanes are uncommon. According to the Sustainable Safety guidelines they would violate the principle of homogeneity and put road users of very different masses and speed behaviour into the same lane, which is generally discouraged.
Evidence from the operation of urban arterials in Brisbane, Australia shows that a properly enforced bus lane, operating as designed without interference, can increase passenger throughput. In 2009 and 2010 traffic surveys showed that in Brisbane on a number of urban arterials with Bus and Transit lanes, non-compliance rates were approaching 90%. Following enhanced enforcement of the lanes, non-compliance rates dropped and overall efficiency of the Bus and Transit lanes improved with an up to 12% increase in total passenger throughput in the lane. Average bus journey times dropped, in some cases, by up to 19%.
Some cities, including San Francisco and New York, employ automated camera enforcement, using either stationary cameras adjacent to the bus lane, or cameras on the front of buses to automatically issue citations to vehicles obstructing the bus lane.
Bus lanes give priority to buses, cutting down on journey times where roads are congested with other traffic and increasing the reliability of buses. The introduction of bus lanes can significantly assist in the reduction of air pollution.
Bus lanes marked with colored pavement have been shown to reduce intrusions into bus lanes, speeding travel time and increasing bus reliability.
Some network lengths of bus lanes in major cities, listed by buses per km of bus lane):
|City||Country||Population (million)||Buses (#s)||Population per bus||Bus lanes (km)||Buses per 1 km of bus lane|
|Singapore||Singapore||5.5||3,775||1,200||200 (23 km are 24-hour restricted bus lane)||29|
|Kunming||People's Republic of China||5.7||~||~||42|
|Beijing||People's Republic of China||19.6||26,000||754||294||88|
|Hong Kong||Hong Kong||6.8||19,768||666||22||899|
|New York||United States||8.5||5,777||1,480||80+:27||111|
|Auckland||New Zealand||1.6||128 (by the end of 2017)|
|Country||Highway||Bus lanes (km)||Section|
|South Korea||Gyeongbu Expressway||137.4||Hannam IC (Seoul) ~ Sintanjin IC (Daejeon)|
|Hong Kong||Tuen Mun Road||8.5||So Kwun Wat ~ Sham Tseng|
The busiest bus lane in the United States is the Lincoln Tunnel XBL (exclusive bus lane) along the Lincoln Tunnel Approach and Helix in Hudson County, New Jersey, which carries approximately 700 buses per hour during morning peak times an average of one bus every 5.1 seconds. In contrast, the Cross Harbour Tunnel in Hong Kong carries 14,500 buses per day, or an average of about 605 an hour all day (not just peak times), but the bus lane must give way to all the other road users resulting in long queues of buses.[further explanation needed]
The installation of bus lanes requires additional space to either be constructed (increasing the impact of the road on the surrounding area, and possibly requiring taking of private land), or space must be taken from existing lanes, reduce the space available for private vehicles.
Bus and taxicab lane sign in Norway
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- Bus rapid transit (BRT)
- Bus priority
- Guided bus
- High-occupancy vehicle lane (HOV lane)
- Public transport bus service
- Reversible lane
- Straddling bus
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