Investigating Time and Distance Halo Effects due to Mobile Photo Enforcement on Urban Roads

  • Author / Creator
    Gouda, Maged K.
  • This thesis investigated time and distance halo effects of Mobile Photo Enforcement (MPE) on urban roads. Speed data was recorded at different distances for several locations during an eight-week time period in the summer of 2015 in Edmonton, Canada. A time series intervention analysis using speed limit violations was conducted in order to determine the time halo effects of MPE. To study the distance halo effects, a two-sample t-test was used to compare speed limit violations during the enforcement site-visits and the corresponding times without enforcement. The results of the analysis indicated that both time and distance halo effects existed at the study locations and there were significant reductions in speed limit violations due to the presence of MPE. It was concluded that, on average, if a MPE unit was deployed eight times during a week for a total of 22 hours (which translates to approximately 2.7 hours per visit), it would produce a i) time halo effect that would extend for a period of approximately five days, and reduce speed limit violation rates by almost 19% and ii) a drop in violations ranging from 10-to-17% over a distance of 500 meters upstream and downstream of the enforcement unit. In addition, a correlation analysis was performed to study the relationship between different enforcement intensity variables, time and distance halo effects, and reductions in speed limit violations. It was found that the number of enforcement visits per week, the total enforcement hours per week, and the average hours per visit were strongly correlated to the longevity of the time halo effects and the reduction of speed limit violations. Moreover, the analysis also revealed that the total enforcement hours per week and the average hours per visit were strongly correlated with the reduction in speed limit violations at different distances upstream and downstream of the MPE unit. The findings of this study can be utilized to significantly increase the coverage of MPE programs and the safety benefits associated with MPE operations. It can also support decision makers with valuable information that help them in their planning and scheduling decisions.

  • Subjects / Keywords
  • Graduation date
    2017-06:Spring 2017
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
    • Department of Civil and Environmental Engineering
  • Specialization
    • Transportation Engineering
  • Supervisor / co-supervisor and their department(s)
    • El-Basyouny, Karim (Department of Civil and Environmental Engineering)
  • Examining committee members and their departments
    • El-Basyouny, Karim (Department of Civil and Environmental Engineering)
    • Kwon, Tae (Department of Civil and Environmental Engineering)
    • Bouferguene, Ahmed (Campus Saint-Jean)