“Manual EMBARQ de segurança viária para projetos de BRT e auditorias de segurança viária dos corredores BRT no Rio de Janeiro” -Luis Antonio Lindau, diretor-presidente da EMBARQ Brasil
Tata AIG General Insurance Company - Insurer Innovation Award 2024
Bus Corridor Safety Research Findings
1.
2. Traffic Safety on Bus Corridors
Overview
Background: 2-year research project
Main findings regarding safety on bus and BRT corridors
Development of design guidelines
Road safety auditing: Rio s BRT corridors
5. Main findings: Overall safety impact of a BRT
Macrobús, Guadalajara
250 5000
Before BRT During BRT construction After start of operations
4500
Citywide crashes
200 4000
3500
150 3000
2500
100 2000
1500
50 1000
500
0 0
6. Main findings: Overall safety impact of a BRT / Busway
Not 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
7. Overview of the research
Methodology
Crash data collection and analysis
Road safety audits and inspections
Discussions with safety experts from bus agencies
Road test and review: getting feedback to improve the guidelines
8. Overview of the research
Data analysis
Example: Results from the Mexico City intersection model
Vehicle collision model (NB) Pedestrian crash model (NB)
Coef. Coef.
Constant -1.518*** -1.857***
Number of legs 0.374*** 0.252***
Number of lanes per leg 0.374*** 0.341***
Left turns per approach 1.705*** 1.268**
Market area - 0.664***
Maximum pedestrian crossing distance (m) - 0.026**
Pedestrian overpass - -0.147
Center-lane BRT (Metrobus Line 1) -0.029 -0.299
Counterflow bus lane 0.554*** 0.389**
Curbside bus lane -0.176 -0.087
No. of observations 216 216
Log likelihood -618.475 -518.539
LR chi2 139.99 104.88
Prob > chi2 0.000 0.000
chibar2(01) 367.14 231.39
Prob >=chibar2 0.000 0.000
*** p<=0.001, ** p<=0.05, * p<=0.1, - variable not included in the model
9. Overview of the research
Road safety inspections
Detailed inspection of operating BRT corridors (here, Av. Caracas,
TransMilenio) together with certified road safety auditors
10. Overview of the research
Road safety audits
Identifying safety issues in project drawings for BRT or bus
corridors and suggesting improvements
12. Factors influencing crash frequencies
Counterflow
Counterflow lanes were strongly correlated with higher
crash frequencies across all our models (p<0.001)
13. Factors influencing crash frequencies
Street width and intersection size and complexity
Road width and complexity of intersections were the most important predictors of
crash frequencies.
Metrobus Line 1, Mexico City
14. Factors influencing crash frequencies
Location of bus lanes
Central median
Shorter pedestrian crossings
Fewer mixed traffic lanes
Some 4-way intersections turned into
T junctions
25. Se as recomendações forem incorporadas:
Redução da gravidade dos acidentes
A cada ano serão evitados (*):
800 acidentes
200 vítimas,
incluindo 10 fatalidades
(*) há casos onde a simples implantação de um corredor de ônibus
levou a um aumento da incidência e gravidade de acidentes