During the last century, many cities converted central two-way streets to one-way operation in an effort to streamline traffic flow and reduce conflicts. Other cities were originally designed with one-way street grids for the same reason. Wide, one-way streets provide an opportunity to reconfigure broad roadbeds with cycle tracks and transit lanes, or to consider conversion into two-way operation for increased access, connectivity, and safety.

Adapted by Global Street Design Guide published by Island Press.