TABLE 1.

Summary of studies on BRT and road safety

Author	Type of study	Setting	Duration	Findings on road safety	Number of crashes by site	p value/significance level reported
Goh et al. 6	Before/after analysis	Bogota, Colombia	10 years	Overall reduction in serious accidents by 50–60 %. Increase of crashes around the stations and where mixed traffic lanes were improved.	12,449 serious traffic accidents in two sites	Not provided
Duduta et al. 7	Before/after analysis	Melbourne, Australia	3 years	14 % overall reduction in all road crashes across 56 sites	160 crashes in the after-period	Significant at 90 %
Duduta et al. 8	Modeling of changes in infrastructure	Several BRT systems. Different analyses carried out in each of them.	3 to 7 years depending on the city	Findings vary across sites. The authors report mixed results with improvements in road safety by 50 % (Guadalajara), as well as deterioration of road safety by 50 % (Delhi). In the count data model, number of legs and lanes per leg, counterflow, level pedestrian crossing and left turns increase the likelihood of collisions. Center medians reduce collisions.	216 in Mexico City (Mexico); 183 in Porto Alegre (Brazil); 164 in Guadalajara (Mexico); 61 in Bogota (Colombia); 17 in Delhi (India)	p < 0.001 for the findings described in the count data model
Woodridge 9	Modeling of changes in infrastructure	Guadalajara, Mexico	5 years	56 % reduction in all road crashes, 69 % reduction in severe crashes.	1010 crashes in the after-period	p < 0.01