Effects of night-time bicycling visibility aids on vehicle passing distance.

Bicycling at night is dangerous, with vehicle passing distances being a key concern, given that the main cause of night-time bicycling fatalities is from motorists hitting bicyclists from behind. However, little is known about vehicle passing distances at night or how they are affected by bicyclist visibility. This study assessed the impact of different bicyclist visibility configurations on vehicle passing distances at night-time.