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

T505.3 Location of Operable Parts.

Operable parts shall be located so that they are reachable by passengers using wheelchair when parked in a clear space 30 inches (760 mm) wide minimum and 48 inches (1220 mm) long minimum. Operable parts shall be located adjacent to the toe end of the clear space or shall be located no more than 10 inches (255 mm) measured from the centerline of the long dimension of the clear space.