Städtebau
Urban design features that may appear to be simple conveniences for persons without disabilities are often essential to anyone who has a disability. The loss of these features presents a significant barrier. For example, sometimes a lack of prompt snow-clearing on sidewalks of major Canadian city streets means that wheelchair and walker users cannot reach pedestrian crossing buttons on crosswalk posts, due to snow bank accumulation around the posts, making the crossing buttons inaccessible. Public services must take into account the need to maintain accessibility features in the urban environment.