49 CFR Parts 37 & 38 - Department of Transportation (DOT) ADA Regulations

(b)

(1) Vehicles intended to be operated solely in light rail systems confined entirely to a dedicated right-of-way, and for which all stations or stops are designed and constructed for revenue service after the effective date of standards for design and construction in §§37.21 and 37.23 of this title shall provide level boarding and shall comply with §§38.73(d)(1) and 38.85 of this part.

(2) Vehicles designed for, and operated on, pedestrian malls, city streets, or other areas where level boarding is not practicable shall provide wayside or car-borne lifts, mini-high platforms, or other means of access in compliance with §38.83(b) or (c) of this part.