1940 Transportation Map of Chicago
Issued by Chicago Rapid Transit Company, also shows streetcar and bus routes
North Section
West Section
South Section
1948 CTA Route Map
One year after CTA takeover
North Section
West Section
Central Section
South Section
1954 CTA Route Map
One year after CTA takeover of Chicago Motor Coach Co.
North Section
West Section
Central Section
South Section
1972 CTA Route Map
One year before elimination of trolleybuses
North Section
West Section
Central Section
South Section
ILLINOIS RAILWAY MUSEUM/CHICAGO ROUTE MAPS
A more extensive collection of scanned images, of past Chicago transit maps