Observing the system's signals, operators start, slow, or stop the subway train. They make announcements to riders, open and close the doors, and ensure that passengers get on and off the subway safely. Operators should have a basic understanding of the operating system and be able to recognize common equipment problems. When breakdowns or emergencies occur, operators contact their dispatcher or supervisor and may have to evacuate cars. To meet predetermined schedules, operators must control the amount of time spent at each station.
Streetcar operators drive electric-powered streetcars or trolleys that transport passengers.
Streetcars run on tracks that may be recessed in city streets, so operators must observe traffic signals and cope with car and truck traffic. Operators start, slow, and stop their cars so passengers may board or alight. They collect fares, and issue change and transfers. They also answer questions from passengers concerning fares, schedules, and routes. On some days subway operators may work multiple shifts.