Trailer Trucking Festival 2013

- HR: Heavy Rigid: a rigid vehicle with three or more axles and a GVM of more than 8,000 kilograms (17,637 lb)). Any towed trailer must not weigh more than 9,000 kilograms (19,842 lb)) GVM. Also includes articulated buses and vehicles in class MR.
- HC: Heavy Combination, a typical prime mover plus semi-trailer combination.
- MC: Multi Combination e.g., B Doubles/road trains.
There is also a heavy vehicle transmission condition for a license class HR, HC, or MC test passed in a vehicle fitted with an automatic or synchromesh transmission, a driver’s license will be restricted to vehicles of that class fitted with a synchromesh or automatic transmission. To have the condition removed, a person needs to pass a practical driving test in a vehicle with non-synchromesh transmission (constant mesh or crash box).