Bus Rapid Transit (BRT) is a broad term given to a variety of transportation systems that, through improvements to infrastructure, vehicles and scheduling, attempt to use buses to provide a service that is of a higher quality than an ordinary bus line. Each BRT system uses different improvements, although many improvements are shared by many BRT systems. The goal of such systems is to at least approach the service quality of rail transit while still enjoying the cost savings of bus transit. The expression BRT is mainly used in North America; in Europe, it is often called busway, while elsewhere, one may speak of quality bus or simply bus service while raising the quality.

Bus rapid transit takes part of its name from rapid transit which describes a high-capacity rail transport system with its own right-of-way, its alignment often being elevated or running in tunnels, and typically running long trains at short headways of a few minutes. A right-of-way is a strip of land that is granted – through an Easement or other mechanism – for Transportation purposes such as for a Rail line or Because of the name similarity one tends to associate the merits of rapid transit also with the newer BRT expression. BRT encompasses a broad variety of modes, including those known or formerly known as express buses, limited busways and rapid busways and even BHNS in France (Bus à Haut Niveau de Service). Bright House Networks Stadium is a 45301-seat Stadium in Orlando Florida.

Ironically, the term bus rapid transit does not refer to the speed of BRT buses. Typical transit speeds of BRT systems range from 12 to 30 miles per hour (19 to 48 km/h) which compares well with surface running LRT. For specific light rail systems many of which use the words "light rail" as part of their name see List of light-rail transit systems. ^[1]

Main BRT features

These bus systems can come in a variety of forms, from dedicated busways that have their own rights-of-way (e. g. , Ottawa's Transitway or the Pittsburgh MLK East Busway) to bus services that utilize HOV lanes and dedicated freeway lanes (e. Ottawa (ˈɒtəwə or sometimes /ˈɒtəwɑː/ is the Capital of Canada and the country's fourth largest municipality. In Ottawa, Ontario, Canada, the Public transit services operated by OC Transpo have two Rapid transit systems the Transitway The Martin Luther King Jr East Busway is a two-lane dedicated bus-only highway serving the city of Pittsburgh and many of its eastern neighborhoods and suburbs In Transportation engineering and Transportation planning, a high-occupancy vehicle lane (or HOV lane) is a lane reserved for Vehicles with g. , Honolulu's CityExpress) to limited stop buses on pre-existing routes. Honolulu is the Capital and most populous Census-designated place (CDP in the U

An ideal Bus Rapid Transit service would be expected to include most of the following features:

• Bus only, grade-separated (or at-grade exclusive) right-of-way : The main feature of a BRT system is having dedicated bus lanes which operate separate from all other traffic modes. This allows buses to operate at a very high level of reliability since only professional motorists are allowed on the busway. A side benefit of this are lower construction costs since busways can be engineered to tighter standards and still remain safe compared to a roadway open to non-professional drivers.
  • Such a right of way may be elevated; on rare occasions, the right of way may be a modified rail right of way,
  • A bus street or transit mall can be created in an urban center by dedicating all lanes of a city street to the exclusive use of buses,
  • Low-cost infrastructure elements that can increase the speed and reliability of bus service include bus turnouts, bus boarding islands, and curb realignments.
• Comprehensive Coverage : In addition to using dedicated busways, BRTs can also take advantage of existing roadways in cities that already have a comprehensive road network for private automobiles. Service can be made more time efficient and reliable than a standard bus system by taking advantage of bus priority methods.
• Serves a diverse market with high-frequency all day service : A BRT network with comprehensive coverage can serve a diverse market (all income ranges) by moving people from their current location to their destination with high frequency and reliability while maintaining a high level of customer experience. As with any transit system, if any of these benefits are taken out of the equation, or do not provide better service than other modes of transit, the network will not be able to serve as diverse a market or offer high-frequency service without heavy subsidy.
• Bus priority / Bus lanes : Preferential treatment of buses at intersections can involve the extension of green time or actuation of the green light at signalized intersections upon detection of an approaching bus. Bus priority or transit signal priority is a name for various techniques to speed up bus public transport services at signalized intersections A bus lane or bus only lane is a lane on a road restricted to Buses and generally used to speed up public transport otherwise held up by traffic congestions Intersection priority can be particularly helpful when implemented in conjunction with bus lanes or streets, because general-purpose traffic does not intervene between buses and traffic signals.
• Vehicles with Tram-like characteristics : Recent technological developments such as bi-articulated buses and guided buses have benefited the set up of BRT systems. Articulated buses (either motorbuses or Trolleybuses) also known as tandem buses, bendy buses, banana buses, slinky buses or Guided buses are Buses steered for part or all of their route by external means usually on a dedicated track. The main developments are:
  • Improved riding quality (guided buses, electronic drivetrain control smoothing the operation),
  • Increased capacity (bi-articulated or double decker),
  • Reduced operating costs (hybrid electric power train).
• A specific image with a Brand name : (Viva, Max, TransMilenio. . . ) and specific stations with state of the art features, automatic vending machines. . .
• Off-bus fare collection : Conventional on board collection of fares slows the boarding process, particularly when a variety of fares is collected for different destinations and/or classes of passengers. An alternative would be the collection of fares upon entering an enclosed bus station or shelter area prior to bus arrivals (similar to how fares are collected at a kiosk before entering a subway system). This system would allow passengers to board through all doors of a stopped bus.
  

  Bus stop of the Rede Integrada de Transporte (RIT) in Curitiba, Brazil. Rede Integrada de Transporte (also known as RIT, Portuguese: Integrated Transportation Network) is a Bus rapid transit system in Curitiba Curitiba (pron kuɾi'tibɐ or kuɾi'tʃibɐ is the capital City of the Brazilian state of Paraná. |utc_offset = -2 to -4 |time_zone_DST = BRST |utc_offset_DST = -2 to -5 |cctld
• Level boarding : Many BRT systems also use low floor buses (or high level platforms with high floor buses) to speed up passenger boardings and enhance accessibility.
• Stations : High quality BRT systems also feature significant investment in enclosed stations which may incorporate attractive sliding glass doors, staffed ticket booths & information booths, and other more standard features listed here such as off-bus fare collection (sometimes through turnstiles), and level boarding. This style of station is particularly prevelant in Latin America, while most North American systems tend to use open platform stops, or shelter-style platform stops.

Acceptance of BRT may increase using trolley-buses, because of the lower gaseous and noise emissions. The price penalty of installing overhead lines can be repaid over a longer period by the savings from centrally generated electricity. Overhead lines or overhead wires are used to transmit Electrical energy to Trams Trolleybuses or Trains at a distance from the

Controversies

Opponents of Bus Rapid Transit initiatives argue that BRT is not an effective replacement for light rail or subway services. They argue that in order for BRT to have greatest effect, it must have its own right-of-way requiring space and often construction costs. A right-of-way is a strip of land that is granted – through an Easement or other mechanism – for Transportation purposes such as for a Rail line or A regular bus service would share the road with cars; a BRT service operating in mixed traffic would be subject to the same congestion, delays, and jarring and swaying rides as do ordinary city buses. Furthermore, signal priority systems, which are often the sole factor differentiating BRT from regular limited-stop bus service (most notably in Los Angeles' extensive "Rapid" system), might cause severe disruptions to traffic flow on major cross streets. Metro Rapid is a Bus rapid transit system in Los Angeles County California, mainly operated by the Los Angeles County Metropolitan Transportation Authority Opponents argued that this merely redistributes, rather than reduces, the traffic congestion problems that BRT systems are designed to alleviate. On the other hand, many light rail systems also utilize signal priority system and railroad-style crossing gates (with long cycle times) to speed up service as well, and in the same time both BRT and light rail get more persons across a road junction than car traffic. The widespread belief that the most effective method of solving traffic congestion problems is to discourage private car usage and the preferential treatment of buses in intersections, along with the conversion of some roads to exclusive bus right-of-ways, will help.

Also, the original system designed in [Curitiba], Brazil, aimed to channel development along the BRT corridor. Retrofitting such a system in cities that have a different pattern of development may not be adequate to address the issues in those cities, or in most cases may be an aid for politicians to 'eco-wash' their stay in office. The original system is also part of a three street network that does not impede road width or road accessibility for traditional usage. It does not affect the character of the street, and clearly, that is the success story of Curitiba. Having dedicated lanes on narrow roads may adversely affect activity on those roads, and could lead to a situation like Howard St in Baltimore which has dedicated Light Rail lanes, but is increasingly treated like a backyard or a corridor for movement, and its distinct lack of character undermines its neighborhood. Another prime example of a disastrous effect of BRT has been in New Delhi. One of its most prime, widest main roads started having huge traffic pileups ever since the BRT was inaugurated in 2008. However, it should be noted that much of the controversy arises from the wide range of definitions of BRT.

Comparison with other forms of mass transit

BRT attempts to combine the advantages of a metro system (exclusive right-of-way to improve punctuality and frequency) with the advantages of a bus system (low construction and maintenance costs, does not require exclusive right-of-way for entire length, at least at the beginning).

Compared to standard bus service BRT systems with dedicated right-of-way and thus an increased average transport speed can provide more passenger-miles with the same number of rolling stock and personnel. They also offer the prospect of a more fluent ride than a normal bus immersed in stop-and-go traffic.

It is simplistic to use calculations to predict the capacity of BRT and normal buses and say typical buses are 12 metres (40 feet) long, articulated buses 18 metres (60 feet). The maximum length for a street-running tram consist (in Germany) is 75 metres (about 250 feet). Light rail systems running in-street are limited to one city block in length, unless, as in Sacramento, CA, they are allowed to obstruct intersections when stopped. Metro trains can be 240 m (about 800 feet) long.

With similar dwell times in stations the capacity of rail systems would scale with the length of the train. For instance, a light rail system running on two-minute headways with 200-passenger cars operating as single units could carry 6,000 passengers per hour. It should theoretically therefore carry 12,000 passengers per hour with two-car trains, and 24,000 per hour with four-car trains. In practice real world delays multiply and headways become disrupted causing a practical limitation of around 12 to 19,000^[2]

The best source of information capacity comes from a study that actually stood at the side of the road and counted passengers. As quoted in. ^[3] a survey by the UK Transport Research Laboratory revealed:

Exhibit 3-22: Maximum Observed Peak Hour Bus Flows, Capacities, and Passenger Flows at Peak Load Points on Transitways

Measured Peak Hour Passenger Flow (Passengers / Hour)

Designated Lane: Ankara, Istanbul, Abidjan 7,300 – 19,500

Designated Lanes with Feeders Curitiba, Brazil 13,900 – 24,100

Designated Lanes with Bus Ordering (Travelling in Clusters) Porto Alegre 17,500 – 18,300

Designated Lanes with Overlapping Routes, Passing at Stations and Express Routes

Belo Horizonte, São Paulo 15,800-20,300

However, many BRT systems such as OC Transpo Transitway, Ottawa and South-East Busway, Brisbane are based on multiple bus routes sharing a common dedicated busway to bypass congestion, especially to/from a central business district. Ankara is the capital of Turkey and the country's second largest city after İstanbul. Istanbul (historically Byzantium and later Constantinople; see the other Names of Istanbul) is the largest city of Turkey Abidjan is the largest city and former Capital of Côte d'Ivoire ( Ivory Coast) Curitiba (pron kuɾi'tibɐ or kuɾi'tʃibɐ is the capital City of the Brazilian state of Paraná. |utc_offset = -2 to -4 |time_zone_DST = BRST |utc_offset_DST = -2 to -5 |cctld Porto Alegre ( is the 10th largest city in Brazil, and the capital city of the Brazilian state of Rio Grande do Sul. Belo Horizonte ( Portuguese for "beautiful horizon", (bɛloɾiˈzõtʃi) is the capital of Minas Gerais state located in the São Paulo ( is the largest city in Brazil, with its metropolitan area ranking among the largest urban areas in the world In Ottawa, Ontario, Canada, the Public transit services operated by OC Transpo have two Rapid transit systems the Transitway The South-East Busway is a grade separated bus-only corridor running south from the Brisbane CBD to Eight Mile Plains, in South East Queensland A central business district ( CBD) is the commercial and often geographic heart of a city In this form, the BRT system passenger capacity is limited by vehicle capacity times vehicle headway of the busway. As buses can operate at headways as low as 10 seconds between vehicles (compared to at least one minute headways for rail vehicles), actual busway capacity can reach passenger rail capacities. At the high end, the Lincoln Tunnel XBL bus lane carries 62,000 commuters in the 4 hour morning peak, more than any Light Rail Line. The Lincoln Tunnel is a 15 mile (24 km long Tunnel under the Hudson River, connecting Weehawken, New Jersey and the borough However, this lane has no stops in it. Stops increase the headway and limit a BRT lane to about 10,000 passengers per hour, even with passing lanes in the stations. Note that this is still five times the number carried in the automobiles in a congested freeway lane.

Many agencies make a clear distinction between a pure BRT, which is in exclusive lanes, and a more compromised form in mixed traffic. For example, the Los Angeles Orange Line runs entirely in an exclusive lane and therefore achieves speed and reliability comparable to rail. The Metro Orange Line is a dedicated transitway operated by the Los Angeles County Metropolitan Transportation Authority which began its operation on October Because it is functionally equivalent to rail, the Los Angeles County Metropolitan Transportation Authority presents this line as part of its rail transit system, distinct from its "Rapid" lines, which run in mixed traffic. Metro Rapid is a Bus rapid transit system in Los Angeles County California, mainly operated by the Los Angeles County Metropolitan Transportation Authority

The typical diesel engine on the bus causes noticeable levels of air pollution, noise and vibrations. Air pollution is the human introduction into the atmosphere of Chemicals Particulate matter, or Biological materials that cause harm or discomfort is a one volume manga created by Tsutomu Nihei as a prequel to his ten-volume work Blame!. Through developing buses as hybrid vehicles and the use of new forms of trolleybus BRT designers hope to increase ride quality and decrease pollution. A hybrid vehicle is a vehicle that uses two or more distinct power sources to propel the vehicle As the energy use for acceleration is proportional to the vehicle mass, electric traction allows lighter vehicles, faster acceleration and energy that can be fed back into batteries or the grid through regenerative brakes. In electronics a battery is a combination of two or more Electrochemical cells which store chemical Energy which can be converted into electrical energy A regenerative brake is a mechanism that reduces Vehicle speed by converting some of its Kinetic energy into another useful form of energy Regenerative braking is standard on modern rail systems.

In contrast to BRT, both Light Rail and rapid transit require the placement of rails for the whole line. For specific light rail systems many of which use the words "light rail" as part of their name see List of light-rail transit systems. The tram usually avoids the high additional costs for the engineering structures like tunnels that need to be built for metros. Rail tends to provide a smoother ride and is known to attract significantly higher passenger numbers than road-based systems.

Many BRT designers have used the need to construct power conduit systems as an argument against Light Rail, but a new proposal, known as ultra light rail, would have trams carry their own power, much like a bus, at a significant energy savings due to lack of rolling resistance.

In larger towns and cities, such as Essen, Germany and Pittsburgh, USA, it is common for a right of way exclusive to public transport to be used by both light rail and buses. Essen (ˈɛsən is a City in the center of the Ruhr Area in North Rhine-Westphalia, Germany. The United States of America —commonly referred to as the

BRT in metro tunnels

Metro Bus Tunnel in Seattle, Washington. The Downtown Seattle Transit Tunnel, also referred to as the Metro Bus Tunnel, is a 1 Washington ( is a state in the Pacific Northwest region of the United States.

A special issue arises in the use of bus vehicles in metro structures. A rapid transit, underground, subway, elevated railway or metro(politan system is an electric passenger railway Since the areas where the demand for an exclusive bus right-of-way is apt to be in dense downtown areas where an above-ground structure may be unacceptable on historic, logistic, or environmental grounds, use of BRT in fully underground tunnels may not be avoidable.

Since buses are almost universally operated by internal combustion engines, bus metros raise ventilation issues similar to those of tunnels. The internal combustion engine is an engine in which the Combustion of Fuel and an Oxidizer (typically air occurs in a confined space called a A tunnel is an underground passageway The definition of what constitutes a tunnel is not universally agreed upon In the case of tunnels, powerful fans typically exchange air through ventilation structures on the surface, but are usually placed in a location as remote as possible from occupied areas to minimize the effects of noise and concentrated pollution.

A straightforward way to deal with this is to use electrical propulsion in tunnels and, in fact, Seattle in its Metro Bus Tunnel and Boston in Phase II of its Silver Line are using this method in their respective BRTs. The Downtown Seattle Transit Tunnel, also referred to as the Metro Bus Tunnel, is a 1 The Silver Line is the Massachusetts Bay Transportation Authority 's (MBTA's sole Bus Rapid Transit (BRT line running in two unconnected sections from In the case of Seattle, dual-mode (electric/diesel electric) buses manufactured by Breda were used until 2004, with the center axle driven by electric motors obtaining power from a trolley wire through a trolley pole in the subway, and with the rear axle driven by a conventional diesel powertrain on freeways and streets. An electric motor uses Electrical energy to produce Mechanical energy. Overhead lines or overhead wires are used to transmit Electrical energy to Trams Trolleybuses or Trains at a distance from the For the weapon see Trolley pole (weapon. trolley pole is a tapered cylindrical pole of Wood or Metal, used to transfer Electricity A diesel engine is an Internal combustion engine which operates using the Diesel cycle (named after Dr For the UK engine manufacturer see Powertrain Ltd. In a Motor vehicle, the term drivetrain, powertrain or powerplant Boston is using a similar approach, after initially using electric trolleybuses to provide service pending delivery of the dual mode vehicles in 2005. In 2004, Seattle replaced its "Transit Tunnel" fleet with diesel-electric hybrid buses, which operate similarly to hybrid cars outside the tunnel and in a low-noise, low-emissions "hush mode" (in which the diesel engine operates but does not exceed idle speed) when underground. A hybrid vehicle is a vehicle that uses two or more distinct power sources to propel the vehicle

The necessity for providing electric power in these environments brings the capital and maintenance costs of such routes closer to Light Rail and raises the question of building light rail instead. For specific light rail systems many of which use the words "light rail" as part of their name see List of light-rail transit systems. In Seattle, the downtown transit tunnel retrofitted for conversion to a shared hybrid-bus and light-rail facility in preparation for Seattle's Central Link Light Rail line to be operating in 2009. Sound Transit Link Light Rail is a rapid transit project under construction for the Greater Seattle region

Bus rapid transit systems

For a list of the transit systems around the world, see List of bus rapid transit systems. This is a of

Implementation

Main article: Implementation of bus rapid transit

See also

Double articulated bus in Hamburg, Germany

• General Motors Streetcar Conspiracy
• New Mobility Agenda
• Quality Assurance in Public Transport
• Queue jump
• Sustainable transportation
• Transit bus
• TransMilenio
• Veolia Transport
• Traffic engineering (transportation)

References

• Gardner, G. , Cornwell, P. , and Cracknell, J. , The Performance of Busway Transit in

Developing Cities, Transport and Road Research Laboratory Research Report 329, Department of Transport, Crowthorne, Berkshire, United Kingdom, 1991

External links

• Design guide for BRT
• BRT Technologies: Assisting Drivers Operating Buses on Road Shoulders
• Bus Rapid Transit Policy Center
• Greater Vancouver Transportation Authority (TransLink) Bus Rapid Transit Evaluation Study (PDF)
• Calgary Transit: A Review of Bus Rapid Transit (PDF)
• Innovative Service Design Among Bus Rapid Transit Systems In The Americas (PDF)
• U.S. General Accounting Office report: "Bus Rapid Transit Shows Promise"
• World Bank report: "Innovative Solutions for Public Transport; Curitiba, Brazil"
• Public Transport International: "BRT in China; James Wang, China"(PDF)
• First Delhi BRT Corridor - BRT Design Summary
• buspriority.org
• NYC Bus Rapid Transit Study
• BRT in China(PDF)
• Transportation Research Board: Bus Rapid Transit, Volume 1: Case Studies in Bus Rapid Transit
• Transportation Research Board: Bus Rapid Transit, Volume 2: Implementation Guidelines
• Transportation Research Board: Transit Capacity and Quality of Service Manual
• BRT WestStart-CALSTART program, in partnership with the FTA). The Federal Transit Administration ( FTA) is an agency within the United States Department of Transportation (DOT that provides financial and technical assistance
• Minneapolis - St. Paul Bus Rapid Transit or Build Roads Today, an excuse to build more highways
• Phileas in Eindhoven, the Netherlands
• Bus Rapid Transit Proposals for Central Connecticut
• MetroBus Hamburg