BRT/Busways and Traffic Safety


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By Claudia Adriazola, Director, Health & Road Safety Program, EMBARQ. Presented at Transforming Transportation, January 27, 2012, Washington, D.C.

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  • In 2007 The Economist highlighted an important global transition. For the first time in history the proportion of humans living in urban areas was set to rise above 50%. As the article stated “wisely or not Homo sapiens have become Homo urbanis”. According to UN predictions the pace of change is set to continue with urbanites making up as much as 65% of the global population by 2030. By 2040 two in three people will live in cities, and the world’s urban population will grow from 3.5 billion to 5.6 billion. The number of "megacities" - urban areas with more than 10 million people - will also continue to explode, mainly in Asia, Latin America and Africa.
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  • BRT/Busways and Traffic Safety

    1. 1. BRT / Busways and Traffic SafetyNicolae Duduta, Claudia Adriazola, Dario Hidalgo, Luis Antonio Lindau, Rebecca JaffeTransforming Transportation 2012Claudia Adriazola-DelgadoDirector, Health & Road Safety ProgramTransforming Transportation 2012January, 27th 2012Washington, DC
    2. 2. BRT / Busways and Traffic Safety AgendaBackgroundMethodologyMain findingsNext steps: BRT / Busways Traffic Safety Guidelines
    3. 3. Meta-Trends affecting sustainable cities The transition to an urban millennium Over 50% in 2007 30% in 1950 14% in 1900 The Global Population3% in 1800
    4. 4. 2011 1 billion
    5. 5. 10 years later…. 1 billion +1 billion
    6. 6. BRT / Busways and Road Safety BackgroundLeading causes of premature death in the world: 2004 2030 1 Ischaemic heart disease 1 Ischaemic heart disease 2 Cerebrovascular disease 2 Cerebrovascular disease 3 Lower respiratory infections 3 Pulmonary disease 4 Pulmonary disease 4 Lower respiratory infections 5 Diarrhoeal disease 5 TRAFFIC ACCIDENTS 6 HIV / AIDS 6 Lung cancers 7 Tuberculosis 7 Diabetes 8 Lung cancers 8 Hypertensive heart disease 9 TRAFFIC ACCIDENTS 9 Stomach cancer10 Low birth weight 19 HIV / AIDS 90% of traffic fatalities occur in low and middle-income countries and involve 70% of vulnerable users of the road In cities, the majority of crashes are concentrated on urban arterials, where BRTs and Busways are usually located
    7. 7. BRT / Busways and Road Safety Background There is gap in knowledge about how different BRT and Busway design features can impact vulnerable users of the road, in particular pedestrian and traffic safetyBRT / Busways and Traffic Safety Research• Nicolae Duduta• Claudia Adriazola• Dario Hidalgo• Toni Lindau• Red EMBARQCollaboration• SVOW• Consia (Carsten Wass)• iRAP• Universidad Católica de Chile• ITDP• World Bank
    8. 8. BRT / Busways and Road Safety Methodology Istanbul Vancouver Guadalajara Delhi Mexico City Ahmedabad Cali Pereira Bogota Belo Horizonte Curitiba Porto Alegre BrisbaneData analysis: Collected and analyzed crash data from bus corridors around the world, including Bogota, Curitiba, Mexico City, Delhi, etc. Developed crash frequency models for bus corridors
    9. 9. BRT / Busways and Road Safety MethodologyRoad safety inspections: Conducted road safety inspections on existing BRT systems Interviewed road safety specialists from different BRT agencies to learn from their experience
    10. 10. Main findings: Overall safety impact of a BRTMacrobús, Guadalajara
    11. 11. Main findings: Overall safety impact of a BRT Macrobús, Guadalajara250 5000 Before BRT During BRT construction After start of operations 4500 Citywide crashes200 4000 3500150 3000 2500100 2000 150050 1000 500 0 0
    12. 12. Main findings: Overall safety impact of a BRT Macrobús, Guadalajara Passenger per hour per direction (peak) Crashes per year2 general traffic lanes 3194 2 general traffic lanes 726 1 BRT lane 5000 1 BRT lane 6
    13. 13. Main findings: Overall safety impact of a BRT Av. Caracas, TransMilenio 70 60Annual fatalities on Av. Caracas, Bogota 50 40 30 20 10 0 1996 1998 2000 2002 2004 2006 2008 2010 Fatalities on corridor Tendency without TransMilenio Tendency with TransMilenio
    14. 14. Main findings: Overall safety impact of a BRT / BuswayNot all systems have had a positive impact on safety Cristiano Machado Busway, Belo Horizonte Corridor with the highest crash frequency citywide BRTS, Delhi Initial increase in fatalities after the implementation of the bus system
    15. 15. The global picture of safety on BRT and Busways Fatalities by road user The safest place to be on a bus corridor is inside the bus The most dangerous: walking to the bus station Bicyclists 5% Other 8%Motorcyclists 10% Pedestrians Car occupants 54% 23%
    16. 16. The global picture of safety on BRT and Busways Location of pedestrian crashes Av. Caracas, TransMilenioPorto Alegre, Brazil Metrobus Line 2, Mexico City
    17. 17. Main findings Factors influencing crash frequencies on bus corridorsOverall road and intersection geometryCounterflowLocation of bus lanes (median or curbside)
    18. 18. Factors influencing crash frequencies Street width and intersection size and complexity Road width and complexity of intersections are the most important predictors of crash frequencies.Metrobus Line 1, Mexico City
    19. 19. Factors influencing crash frequenciesCounterflow Counterflow lanes were strongly correlated with higher crash frequencies across all our models (p<0.001)
    20. 20. Factors influencing crash frequenciesLocation of bus lanes
    21. 21. Safety issues on center-lane systemsIllegal left turns and lane use
    22. 22. Safety issues on curbside bus corridors Pedestrians and cyclists in the bus lanesAv. Caracas, TransMilenioMetrobus Line 2, Mexico City
    23. 23. Safety issues on curbside bus corridors Right turns across the bus lanesAv. Caracas, TransMilenioMetrobus Line 2, Mexico City
    24. 24. The global picture of safety on BRT and Busways Cyclists using the bus lanes Av. Caracas, TransMilenioCyclists perceive the bus lanes as safer than the general traffic lanes, and oftenprefer to use themBut the lanes are not designed to accommodate both buses and bicycles, and therehave been serious crashes involving BRTs and bikesMetrobus, in Mexico City, has reported a growing problem with BRT / bicycle crashes Metrobus Line 2, Mexico City
    25. 25. Next stepsBRT safety guidelines September 2012