LandVehicle is the class of TransportationDevices that travel on land. The two main types of LandVehicle are RoadVehicle and RailVehicle. Note that this includes vehicles which travel on any solid surface, including a frozen body of water or snow.
||EmergencyRoadVehicle||EmergencyRoadVehicle is the subclass of EmergencyVehicle that includes RoadVehicles designed for special use in emergencies, e.g., Ambulances, FireEngines.|
| ||MilitaryTank||A MilitaryVehicle that moves along the ground on treaded wheels and that contains a large cannon.|
| ||SelfPoweredRoadVehicle||SelfPoweredRoadVehicle is the class of RoadVehicles that are also PoweredVehicles. SelfPoweredRoadVehicle covers motorcycles, semi-trailers, RVs, etc., as well as Automobiles. This class includes vehicles powered by electricity, gasoline, diesel, and other fuels.|
| ||TractorTrailer||TractorTrailer is the subclass of RoadVehicles that are truck tractor- truck trailer combinations.|
| ||Trailer||Any RoadVehicle that is also an UnpoweredVehicle, and intended to be towed by a PoweredVehicle.|