Although situated literally above the grid, elevated trains in fact followed its pattern quite closely. The expense of buying or condemning land in order to cross over property was doubtless a major reason for the consistent "alley routes" taken by the elevated, which necessitated including multiple sharp turns in the track. Later both elevated and ground-level lines followed diagonal routes, including the Blue Line with its long stretches along Milwaukee Avenue and down the center of the Kennedy Expressway, and the Orange Line that parallels portions of Archer Avenue.

Publisher: McComber Directory Company
Source: Chicago Historical Society (ICHi-37355)