Roadway Lighting As Countermeasure For Nightitme Collisions: Case Study Of Quebec’s Highways And Arthabaska Roads

EXTENDED ABSTRACT: Compliance with roadway lighting regulations is not sufficient to warrant effective reductions in nighttime collisions, lighting levels are disconnected from the crash history. A method to estimate effective lighting levels from locally observed crash history is presented. It uses statistical analyses to estimate the explanatory power of illuminance, luminance, and uniformity ratios. Findings: from Arthabaska region illuminance was not useful on road segments, luminance levels should be increased and uniformity variations reduced. For highways in Quebec, luminance should be increased up to 1.5cd/m2 and illuminance-uniformity reduced to one in order to reduce collision’s severity