Code of Federal Regulations Title 23. Highways § 23.1235.7 Parking space design, construction, and designation

(1) Ensure that parking spaces are accessible to, and usable by, persons with disabilities which limit or impair the ability to walk;

(2) Ensure the safety of persons with disabilities which limit or impair the ability to walk who use these spaces and their accompanying accessible routes;  and

(3) Ensure uniform sign standards which comply with those prescribed by the “Manual on Uniform Traffic Control Devices for Streets and Highways” (23 CFR part 655, subpart F) to designate parking spaces reserved for persons with disabilities which limit or impair the ability to walk.