Investigation of Time into Red for Red Light–Related Crashes

Abstract

This paper describes a research effort to determine the time into red of 63 red light–related crashes. From these 63 crashes, the relationship of time into red and the red light–related crash type is explored, as are relationships to other factors. From the red light–related crashes investigated, it was found that red light–related crash type was related to time into red. Other factors were not found to be related to time into red, although the sample size and selection method prevented any definitive findings. A brief discussion of the possible safety effectiveness of the all-red interval is also included. The time into red of red light–related crashes is related to the time into red of red light violations, so a characterization of red light violations and crashes is provided, along with suggested red light violation countermeasure classifications for each type of red light violation.