Tractor vehicle and trailer having in particular two axles

The traction vehicle (1) has a twin-axle trailer (2). There is a pivot joint between the traction vehicle and trailer, which is easy to couple and uncouple. There is a corridor (10) between the traction vehicle and the trial are, which is enclosed by a bellows (11). There is a crossing bridge (12) between the traction vehicle and the trailer, forming the floor of the corridor.