A meta-analysis of studies concerning the safety effects of daytime running lights on cars
- Published: Accident Analysis and Prevention, 28 (6) 685-694, 1996
- Authors: Elvik R
- Date Added: 25 Jan 2014
- Last Update: 25 Jan 2014
A meta-analysis of 17 studies that have evaluated the effects on traffic safety of using daytime running lights (DRL) on cars
The studies included in the meta-analysis were retrieved by means of literature surveys that were part of previous evaluation studies and by scanning recent reports. A total of 17 studies were included.
The intrinsic effect of DRL was found to be very robust with respect to both study design and definition of the dependent variable.
The best estimate of the intrinsic effect of DRL on cars is a 10-15% reduction in the number of multi-party daytime accidents.
Daytime running lights, Evaluation studies, Meta-analysis, Safety effects
All studies of the aggregate effect of DRL are non-experimental before-and-after studies. This study design does not take account of all confounding factors that are likely to be present.