Interior view of retired Chicago Transit Authority 6000 series cars. The Illinois Railway Museum. Union Illinois USA. August 2000.

This is an interior view looking through the open end door into the other car ,of a two car married pair CTA 6000 series rapid transit train. These cars were refered to as "Married Pairs", as they were permanently coupled with a draw bar between cars, had a cab at each end of the train, and could not be operated as a single unit. Two cars equalled one unit on the 6000 series cars, and on the current CTA Fleet as well.