Official definition

This U.S. industry comprises establishments primarily engaged in operating local and suburban ground passenger transit systems (except mixed mode transit systems, commuter rail systems, and buses and other motor vehicles) over regular routes and on regular schedules within a metropolitan area and its adjacent nonurban areas. Illustrative Examples: Commuter cable car systems (i.e., stand-alone) Light rail systems (i.e., stand-alone) Commuter tramway systems (i.e., stand-alone) Monorail transit systems (i.e., stand-alone) Commuter trolley systems (i.e., stand-alone) Subway systems (i.e., stand-alone) Cross-References. Establishments primarily engaged in--