Effects of red light running camera systems installation and then deactivation on intersection safety.

Introduction: The primary objective of this paper is to evaluate the safety impacts of red-light running camera (RLC) system installation and then deactivation at 48 intersections in Houston, Texas. The second objective is to evaluate the spillover effect at nearby non-treated intersections in Houston after the deactivation.

Methods: To accomplish study objectives, an Empirical Bayes (EB) before-after analysis was used.