An exception to the minimum number of accessible
spaces required is permitted where obligated organizations can demonstrate that it is not practicable to comply with the requirement because existing physical or site
constraints prevent it from
meeting the required ratio, such as where the minimum width for accessible parking
spaces or access aisles can not be
met because of existing pay and display parking meters, surrounding curb edges, walkways, landscaping, or the need to maintain a minimum drive - aisle width.