track-laying definition
track-laying in relation to a vehicle means that the vehicle is so constructed that its entire weight is not transmitted to the road surface by circular wheels;
track-laying in relation to a vehicle means a vehicle that is propelled by endless tracks or by a combination of wheels and endless tracks;
track-laying in relation to a vehicle means a vehicle so designed and constructed that the weight thereof is transmitted to the road surface either by means of continuous tracks or by a combination of wheels and continuous tracks in such circumstances that the weight transmitted to the road surface by the tracks is not less than half the weight of the vehicle;