Research Papers

Vehicle-Pedestrian Accidents at Signalized Intersections: Exposure Measures and Geometric Designs

Filename FINAL-PAPER-31.docx
Filesize 1 MB
Version 1
Date added June 10, 2012
Downloaded 8 times/fois
Category 2012 CMRSC XXII Banff
Tags Session 1A
Author/Auteur David Fernandes, Luis F. Miranda-Moreno, Patrick Morency

Abstract

Pedestrian safety is a topic of growing concern. To better understand the environmental factors (traffic controls, geometric layout and land use factors) associated with pedestrian-vehicular accidents, this paper presents a methodology for quantifying pedestrian accidents at signalized intersections. For this purpose, a rich and unique intersection inventory with geometry and accident data was built and analyzed comprising a very large sample of 1,875 signalized intersections across the island of Montreal, Canada. To investigate the impact of vehicle movements, three separate definitions of risk exposure were used: completely aggregated flows, motor-vehicle flows aggregated by movement type (left, right and through movements) and disaggregated flows analyzing potential conflicts between motor vehicles and pedestrians. Various negative binomial (NB) models were fitted to the data with and without geometric design characteristics. Among other findings, vehicular traffic is found to be the main contributing factor in accordance with previous works. A separate analysis was conducted to incorporate geometric variables into the risk exposure models. Significant geometric properties included pedestrian phasing, commercial entrances and exits, total crossing distance, curb extension and number of lanes. Pedestrian phasing and curb extensions were found to decrease pedestrian accidents, whereas longer crossing distances, number of lanes and more commercial entrances and exits were found to increase pedestrian-vehicular accidents after controlling for vehicular and pedestrian flows.

David Fernandes, Luis F. Miranda-Moreno, Patrick Morency