3rd edition 2016. Chicago street plan and a road map of the region around Lake Michigan on a double-sided map printed on waterproof paper. The scale is 1:12.500 for Chicago’s central districts, providing coverage from Wrigley Field in the north to beyond the McCormick Place Convention Center, and inland to the Western Avenue. A separate inset covers the Oak Park area.
On the reverse is an indexed road map at 1:1,000,000 of the region around Lake Michigan, extending west to include Peoria and Springfield in Illinois, south beyond Indianapolis and Cincinnati, and east to include Detroit and Columbus, Ohio.