These trains carry passengers and freight between stations. Locomotive engineers operate trains in train yards and between stations. Rail yard engineers move cars within train yards to put trains together or take them apart. Engineers operate the throttle to start and speed up the train. They monitor gauges and meters that measure speed, fuel, temperature, and air pressure in the brake lines.
Engineers watch for signals that indicate speed limits and other information.
They must know the signal systems, yards, and stations along their routes. They also must constantly be aware of the condition of their train because this affects braking. Before and after trips, engineers check the locomotives for mechanical problems. They make minor adjustments and report major repairs to mechanics. Assistant engineers monitor instruments and signals as well as observe the track for obstructions.