01625999

Component

Urban signalized intersections in Indian cities report high share of fatalities and serious injuries. However, assessment of safety using rigorous statistical technique is still in early stage in India, primarily due to challenges in obtaining crash data, road geometric and traffic data. This study proposed a methodology combining a proactive and reactive approach by utilizing Road Safety Audit (RSA) principles and statistical assessment techniques, to identify elements posing risk at urban signalized intersections in Kolkata, India. A wide range of factors ranging from the built environment, intersection geometric design and operational parameters are identified and recorded from twenty five sites based on their hypothesised effect from RSA and site visits. Subsequently correlation analysis is performed and Safety Performance Functions are developed using count regression models. Based on the combined proactive and reactive assessments, there is evidence that increased interaction between motorized and non-motorized traffic pose high risk at signalized intersections. Locations, such as markets and commercial areas, busstops, and locations where footpaths are occupied encourage such interactions and witness higher number of crashes. There is also evidence through statistical analysis that signalized intersections with wide major roads are associated with more number of crashes. Finally, results indicate that higher volume of traffic from minor roads compared to major road traffic has diminishing effect on crash risk at the signalized intersections. This unique finding can help plan improved traffic management specifically at those signalized intersections where high volume carrying major roads meets smaller minor roads, for improved safety.

This paper was sponsored by TRB committee ABE90 Standing Committee on Transportation in the Developing Countries. Alternate title: Safety Analysis of Urban Signalized Intersections in Kolkata, India, Using a Combined Proactive and Reactive Approach

01618707

17-06331

English

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Built environment; Correlation analysis; Geometric design; Highway safety; Highway traffic control; Signalized intersections; Statistical analysis; Urban highways

Proactive assessment

Kolkata (India)

Highways; Operations and Traffic Management; Safety and Human Factors

Transportation Research Board Annual Meeting 2017 Paper #17-06331

TRIS, TRB, ATRI

Dec 8 2016 12:34PM