Citation

Gouda M, El-Basyouny K. Transp. Res. Rec. 2017; 2660: 30-38.

Copyright

(Copyright © 2017, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

10.3141/2660-05

PMID

unavailable

Abstract

This paper investigates the distance halo effects of mobile photo enforcement (MPE) on urban roads in Edmonton, Alberta, Canada. Speed data were recorded at various distances upstream and downstream of nine locations during four MPE site visits and at the corresponding times in 4 days without enforcement. Data collection was performed during the summer months of 2015. A two-sample t-test was used to compare the speed limit violations during the enforcement site visits and during the corresponding times without enforcement. The results of the analysis indicate that distance halo effects existed at all study locations and that significant reductions in speed limit violations occurred. The authors concluded that, on average, if an MPE unit were deployed eight times during a week for 22 h (equivalent to 2.7 h per visit), the unit would produce a drop in violations ranging from 10% to 17% over a distance of 500 m upstream and downstream of the enforcement unit. In addition, the number of enforcement hours per week and the average hours per visit were found to be strongly correlated with the reduction in speed limit violations. The findings of this study can help enforcement agencies significantly increase the coverage of MPE programs and their expected safety benefits.

Language: en