The term crew car may also refer to a track speeder.
A crew car (also known as a relay van) is a passenger carriage specially fitted out for the use of train drivers. Interior fittings include a sleeping compartment for each crew member, a lounge area, a kitchen, a bathroom, and laundry. They are usually provided with an onboard generator system and air conditioning. The practice is also known as Relay Working.
Background
They are used mainly on long-distance Intermodal freight trains in Australia and Grain trains that travel with two crews, who alternate crewing the train on duty / off duty during the journey. The car is usually marshalled directly or a few carriages behind the locomotives. Most crew cars have been converted from older SAR, VR and NSWGR passenger cars or depowered SAR Bluebird Railcars.[1]