In the 1950's, the CTA modernized most of its fleet with these St. Louis cars, many of them built using components from trade-in PCC streetcars. Cars were in married pairs and numbered 6001-6720. Cars 6101 and 6102 have been preserved at the Fox River Trolley Museum in South Elgin, IL, in their original paint scheme.
Cars 1-50 were similar to the 6000's, but were single unit cars. The doors on these cars were closer to the ends, enabling the motorman to collect fares in certain situations. These cars were painted green and white during most of their lives. After these cars have been retired from regular service, they were used for fan trips and other special movements. Photo taken on April 2, 1997, at the Harlem Avenue terminal of the Lake Street Green Line.
The CTA's first air conditioned cars were the series 2001-2180, delivered in 1964. These cars last operated on the Green Line in 1994, and finished their lives in this current CTA paint scheme. These cars were originally painted green and white. Car 2154 is preserved at the Illinois Railway Museum.
Cars 2201-2350 were built by Budd in 1969-1970. The cars were later rebuilt by New York Rail Car in Brooklyn, and spent most of their lives on the Blue Line. These were the last cars with "blinker" doors, which turned inward as they opened. Location is the Racine stop on the Blue Line.
Cars 2401-2600 were built by Boeing-Vertol in 1976-1978. The cars were later rebuilt in the CTA shops, and were last assigned to the Green Line and the Purple Line. These were the CTA's first cars with sliding doors, enabling wheelchair access. Location is the Belmont stop in 1996, when they were assigned to the Red Line.
The 2400 series cars made their last run on January 21, 2015. An 8 car train was restored to its original "bicentennial" paint scheme, with wider red white and blue stripes. Car 2456 leads the final northbound train at the Garfield stop on the Green Line. The train would proceed to Howard Street, using the old ramp connecting with the State Street Subway at Roosevelt Road.