"Transport or transportation is the movement of humans, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline and space. The field can be divided into infrastructure, vehicles and operations. Transport is important because it enables trade between people, which is essential for the development of civilizations." wikipedia
Traffic, Trains, Buses, Aircraft, Air balloons, Copters, Carriages, Retro Cars, Trucks, ALL to do with transportation of people and goods.
Art depicting transport is acceptable, but not fantasy art.