The goal of the project is to determine the severity of red light running (RLR) in Rhode Island. Central to the data capture process is the use of specialized portable video camera set-ups, which capture views of every approach with one camera. Signal phasing is captured simultaneously by linking to the signal controller. The audio data are transmitted using wireless technology. Twenty intersections are viewed throughout the state, ranging from rural to urban settings. For the twenty intersections viewed, there are a total of 8,597 violations observed over 1358 hours of videotape. This yields an average RLR violation rate of 6.3 violations/hr or a violation every 9.5 minutes. For the individual intersections, the violation rates range from 1.2 to 15.0 per hour. The violations are also specified by the time that has elapsed in the red phase. From analysis of the data, there are intersections in Rhode Island where RLR is a problem. A model is developed to prioritize intersections based on a Composite Intersection Index (CII), where the highest score indicates the most problematic intersection. The CII is based on a comprehensive set of variables including the following: (1) the entering average daily traffic (ADT) ( in 10,000s of vehicles) per number of lanes entering the intersection; (2) the rate of RLR violations occurring after 1 second; (3) the number of phases; and the (4) average approach speed (based on approach speed limits).
Samenvatting