Knowledge CentreTechnical Resources SearchConference PapersCombined Ranking Method for Screening Collision Monitoring Locations along Alberta Highways

Combined Ranking Method for Screening Collision Monitoring Locations along Alberta Highways

Abstract

This paper examines the results of combining two common screening methods: Critical Collision Rate and Weighted Severity, to develop an effective and practical method for identifying intersection sites for further on-site evaluation. The critical collision rate screening method has been used widely among practitioners to adjust for high collision rates resulting from low traffic volumes; however, the critical collision rate method does not account for collision severity. Conversely, the collision severity method equates the severity of collision to a common base, but does not account for traffic exposure and the rate in which collisions are occurring. Alberta Transportation developed a collision screening method that combines a weighted severity with the critical rate of collisions. This combined method is simple, efficient and more accurate than basic screening methods and accounts for collision severity as well as the traffic exposure. The analysis shows combining these two common screening methods provides the greatest number of special monitoring locations (locations with three or more similar collisions in five years), multiple severe collision types, highest traffic exposure and greatest number of collisions occurring at atgrade intersections when compared to other screening methods.

Conference Paper Details

Session title:
EFFECTIVE METHODS FOR IDENTIFICATION OF POTENTIAL SITES FOR ROADWAY IMPROVEMENTS (B)
Author(s):
Robert Duckworth
Muhammad Imran
Jack Chan
Topics:
Road safety
Year:
2011