36 CFR Part 1192 Americans with Disabilities Act (ADA) Accessibility Guidelines for Transportation Vehicles (2016 Non-Rail Vehicle Guidelines)

T503.5 Exterior Illumination for Boarding and Alighting Areas.

Exterior lighting shall be provided to illuminate walking surfaces of boarding and alighting areas when the doors of non-rail vehicles are open. Where doorways have steps, the illumination shall be 1 foot-candle (11 lux) minimum for a distance of 3 feet (915 mm) measured beyond the outside edge of the doorway or bottom step tread. Where doorways have ramps, bridgeplates or lifts, the illumination shall be 1 foot-candle (11 lux) minimum for a distance of 3 feet (915 mm) measured beyond the edge of the ramp, bridgeplate or lift farthest from the non-rail vehicle.