Evaluation of Collision Rate Trends on Daylight Headlight Sections in California

摘要

The study presented in this report consists of two main parts. The first partcompares frequencies, rates, and severity of daylight traffic collisions experienced on six daylight headlight sections (DHS) three years before and after they were established. This portion of the study also evaluates the effects of traffic flow characteristics, geographic location, and climatic factors on the safety improvements likely to be gained on two-lane rural conventional highways due to establishment of DHS and subsequent use of daytime running light (DRL). The second part of the study compares trends in daytime crash and severity rates for five two-lane DHS with the corresponding average rates for two-lane rural conventional highways statewide during the same ten-year period (1982-91).