This study estimates the effectiveness of passenger vehicle daytime running lights in reducing two-vehicle opposite direction crashes, pedestrian/bicycle crashes, and motorcycle crashes. The authors chose the generalized simple odds, a conventional statistical technique, to analyze the data.Results based on simple odds indicate that from 1995 to 2001:• DRLs reduced opposite direction daytime fatal crashes by 5 percent.• DRLs reduced opposite direction/angle daytime non-fatal crashes by 5 percent. • DRLs reduced non-motorists, pedestrians and cyclists, daytime fatalities in single-vehicle crashes by 12 percent.• DRLs reduced daytime opposite direction fatal crashes of a passenger vehicle with a motorcycle by 23 percent.Reviewers of this paper required the inclusion of results using the odds ratio technique. The estimated the effect of DRLs are –6.3 percent, –7.9 percent, 3.8 percent, and 26 percent, respectively. None of these results were statistically significant. (Author/publisher)
Samenvatting