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- "Map Showing Chicago's New Subway and Elevated Road Connections," circa 1940 - This map introduced Chicagoans to the Chicago Rapid Transit Company's new subway lines, which would complement and relieve traffic on existing surface and elevated rail lines. When the CRT opened their subway lines in 1943, Chicago's rail lines, buses and streetcars were all run by separate, private companies; they merged in 1947 to become the municipally owned Chicago Transit Authority.

- circa 1940
- Collections - Artifact
"Map Showing Chicago's New Subway and Elevated Road Connections," circa 1940
This map introduced Chicagoans to the Chicago Rapid Transit Company's new subway lines, which would complement and relieve traffic on existing surface and elevated rail lines. When the CRT opened their subway lines in 1943, Chicago's rail lines, buses and streetcars were all run by separate, private companies; they merged in 1947 to become the municipally owned Chicago Transit Authority.