Other other

Most systems had cars that were converted to specific uses on the system, other than simply the carriage of passengers. As just one example, the Melbourne system used or uses the following: a Ballast Motor, Ballast Trailers, a Blow Car, Breakdown Cars, Conductors and/or Drivers' Instruction Cars, a Laboratory Testing Car, a Line Marking Car, a Pantograph Testing Car, Per Way Locomotives, Rail Grinders, a Rail Hardner Loco., a Scrapper Car, Scrubbers, Sleeper Carriers, Track Cleaners, a Welding Car, a Wheel Transport Car and a Workshops Locomotive.[30]

Many systems have passenger carrying vehicles with all-over advertising on the exterior and/or the interior.