For the purposes of the Road Traffic Acts, any mechanically propelled vehicle intended or adapted for use on the roads. This includes motor cars (vehicles of not more than 3050 kilograms in unladen weight, designed to carry loads or up to seven passengers) and motor cycles (vehicles of not more than 410 kilograms in unladen weight and having less than four wheels). A car from which the engine has been removed may still be considered to be mechanically propelled if the removal is temporary, but if so many parts have been removed that it cannot be restored to use at a reasonable expense, it ceases to be mechanically propelled. A dumper used for carrying materials at a building site is not intended for use on roads, even if it is in fact used on a road near the building site; and a go-kart is not intended nor adapted for use on the roads (even though it is capable of being used on the roads). See also conveyance.