Abstract: A vehicle comprising in combination a towing vehicle and a trailer vehicle, with each vehicle having a body of generally rectangular shape in vertical section. The bodies each have upright sides and a roof, the roof of each of the bodies having an upwardly facing upper surface for the most part lying horizontally in the direction of travel of the vehicle. The towing vehicle body has a profiling device located at the rear of the body and defining a roof surface which slopes downwards towards the rear. The trailer vehicle body is also provided with a profiling device at the forward end of the body and defining a roof surface of the trailer vehicle body which slopes upwards towards the rear. Side ridges are arranged to each side of the sloping surfaces of the towing and trailer body profiling devices, with the ridges extending above the level of the sloping surfaces.