diesel-electric locomotive [1]
Vehicle with a diesel engine turning a generator that in turn powers the electric traction motors.
sandbox 
Container for the sand that is strewn on the track in front of the wheels to provide friction.
coupler head 
Device on each end of a locomotive or car for attaching it to another locomotive or car.
pilot 
Steel bar attached to the frame that pushes aside debris from the track.
fuel tank 
Reservoir containing the diesel fuel that makes the vehicle self-sufficient.
safety rail 
Guardrail to prevent falls.
horn 
Sounding device warning of the train’s approach.
driver’s cab 
Compartment where the engineer operates the locomotive and has a view of the track ahead.
headlight 
Lamp illuminating the track.