In walkable urban environments, buildings are placed right at the edges of streets and public spaces, rather than being set back behind parking lots or expanses of landscaping. These built edges provide a sense of definition to streets and other spaces, which helps makes the environment more legible and coherent. At all scales, from big-city downtowns to small neighborhood centers, edges help reinforce circulation routes while allowing easy pedestrian access to buildings. Building entrances are on or next to sidewalks. Setbacks from the street are short and exist only to provide public space or a transition from public to private life.
Where buildings are set back behind parking lots or landscaping, pedestrians are isolated from uses and activities, exposed to traffic and forced to walk greater distances. Even if a walking path or sidewalk is provided, pedestrians and transit users receive the message that they are of secondary importance. Loading docks, service entrances, blank walls and driveways should be limited in size and located where they minimize disruption of pedestrian access.