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Roadside Assistance Vehicle Lighting: Review of Scientific Research and State Regulations
Towing and service technicians and other responders are at high risk of being struck by passing motorists while working at the roadside. The fatal and serious injury rate is about 16 times higher than for other industries. With the goal to significantly improve the safety of roadside responders, the AAA Foundation for Traffic Safety has conducted multiple research studies during the past several years, including the work presented in this report. Service vehicle warning lights are an important part of raising the conspicuity of roadside workers, alerting drivers of their presence well in advance. However, too much light or certain flash patterns can create glare or distractions for approaching motorists, among other effects. This report describes the results of a review of the available scientific evidence regarding different characteristics of service vehicle lighting, such as color, flash patterns, and intensity. This is augmented by a review of state regulations and statutes related to allowable light properties in each region. This report should be of interest to roadside assistance professionals as well as first responders, road authorities with responsibility for traffic incident management, and policymakers.
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