Guide to the ADA Standards

Can accessible spaces be parallel instead of perpendicular?

The Standards do not specifically require that accessible spaces be perpendicular instead of parallel, but perpendicular parking spaces are preferred at facilities located on sites because most allow users to park facing in or out depending on the side that the access aisle is needed. If accessible parking spaces at facilities located on sites (as opposed to those located along public streets) are parallel, they must fully comply with all applicable requirements, including those for access aisles and for van spaces.