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FHWA Contact: Michael Griffith, HRDS-02, 202–493–3316

This document is an Executive Summary of the report Safety Evaluation of Red-Light Cameras, FHWA-HRT-05-048, published by the Federal Highway Administration in April 2005.

The fundamental objective of this research was to determine the effectiveness of red-light-camera (RLC) systems in reducing crashes. The study involved an empirical Bayes (EB) before-after research using data from seven jurisdictions across the United States to estimate the crash and associated economic effects of RLC systems. The study included 132 treatment sites, and specially derived rear end and right-angle unit crash costs for various severity levels. Crash effects detected were consistent in direction with those found in many previous studies: decreased right-angle crashes and increased rear end ones.

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