They may make minor repairs to airhoses and couplers. In case of unexpected stops, brake operators set up signals to protect both ends of the train. When freight trains approach an industrial site, the brake operator in the locomotive gets off the train and runs ahead to switch the train to the proper track. They uncouple the cars and throw track switches to route them to certain tracks if they are to be unloaded, or to an outgoing train if their final destination is further down the line. They also set hand brakes to secure cars.
Many smaller railroads operate with only two crew members an engineer and a conductor.
Most passenger trains no longer employ brake operators but employ assistant conductors to help conductors collect tickets and assist passengers. Subway and streetcar operators. Subway operators control subway trains, observing the signal system. They start, slow, or stop the subway train on signal. Subway operators make announcements to riders, open and close the doors, and ensure that passengers get on and off the subway safely.