Research Papers

Evaluating the Signal Head Upgrade Program in the City of Surrey

Filename cmrsc22_Surrey_paper-v2.pdf
Filesize 99 KB
Version 1
Date added June 10, 2012
Downloaded 4 times/fois
Category 2012 CMRSC XXII Banff
Tags Session 5A
Author/Auteur Karim El-Basyouny, Tarek Sayed


This paper evaluates the impact of the Signal Head Upgrade Program in the City of Surrey, which was implemented by the Insurance Corporation of British Columbia (ICBC). To investigate the impact of the program, Full Bayes multivariate linear intervention models with a multiple regression links representing time, treatment, and interaction effects as well as the traffic volumes effects is proposed. The models were utilized to determine the safety impacts of the program on each combination of collision seve rity and collision time of occurrence (i.e. severe/day-time, severe/night-time, PDO/day-time, PDO/night-time) in the City of Surrey. The results indicated the effectiveness of the progr am in improving the safety of the treated intersections as there were reductions in all types of collisions at the treated sites after the improvement. However, such reductions were significant only for night-time severe collisions and day-time PDO collisions.

Karim El-Basyouny, Tarek Sayed