COMBINATION VEHICLE, TRAILER, AND TRACTOR

A combination vehicle includes a tractor and a trailer towed by the tractor. The trailer includes a first tank that is configured to store a high-pressure gas as a fuel used by the tractor to travel. The tractor includes a second tank that is configured to store a high-pressure gas as a fuel used by the tractor to travel. The combination vehicle is configured to travel using the fuel supplied from the first tank and the second tank.