While new public buildings are usually designed with accessibility features, at least in North America, the longer length and wider turning radius may make it difficult to use them. This is a greater problem in older buildings which may have had to make compromises in retrofitting accessibility aids. For example, an elevator or lift may be adequate for a wheelchair, but too short for a mobility scooter. Hallways may be too narrow to make a right-angle turn. Or the "privacy" wall in most washrooms may restrict the entry so that the scooter cannot maneuver around it.