Normally, one mile comprises eight Chicago blocks, but the arterial streets Roosevelt Road, formerly named Twelfth Street and at 1200 South, and Cermak Road (Twenty-Second Street) were platted before the eight-blocks-per-mile plan was implemented. Roosevelt Road is one mile south of Madison Avenue and there are twelve blocks within that mile.
In general, a mile in Chicago typically consists of eight city blocks; however, some streets, such as Roosevelt Road and Cermak Road, were established prior to the standardization of this system. Roosevelt Road is located one mile south of Madison Avenue and contains twelve city blocks within that distance.