Evaluating the use of red light running photographic enforcement using collisions and red light running violations ; Final Report

PDFTech ReportHighway safetyTraffic control devicesTest proceduresRed light runningUnited StatesUNC Institute for Transportation Research and EducationHummer, Joseph S.Cunningham, Christopher M.UNC Institute for Transportation Research and EducationNorth Carolina Governors Highway Safety ProgramNTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Control DevicesUS Transportation CollectionThe issue of red light running (RLR) has long been a problem throughout the United States.There is considerable debate within the general public and public agencies regarding the use ofphotographic enforcement to deter red light violations. Many studies have been conducted onthe effectiveness of red light cameras (RLCs) at reducing collisions. However, the question stillremains as to whether RLCs actually change driver behavior. Many municipalities across theState of North Carolina have relied on studies conducted in other states or countries to validaterigorous. The need for more thorough study motivated this research effort to help define theeffectiveness of RLCs within the City of Raleigh, North Carolina.Four specific tasks were identified to help in this research effort. First, a literature reviewwas conducted to determine the reported effects of other research efforts throughout the UnitedStates and other countries. Various types of studies have been conducted around the world. Ofparticular interest were studies that were rigorous in nature, such as those using comparison sites.Many studies indicate that RLC enforcement reduces the frequency of collisions at treatedintersections. However, there are a limited number of rigorous studies (especially those in theUnited States and in North Carolina). Analyses that used comparison sites usually did notperform tests to see if comparison sites acted in a similar manner to treatment sites.Six focus groups were convened in an effort to gather information on attitudes, opinions,and beliefs associated with photographic enforcement to better enhance traffic law enforcement.Two community and four professional focus groups were assembled. Overall, the perception ofphotographic enforcement was positive