Road vehicle train combination with a tractor and a trailer as a semi-trailer

The invention relates to a road vehicle train combination with a tractor and a trailer as a semi-trailer. The road vehicle train combination is provided with the tractor, especially a tractor and a trailer as a semi-trailer. The trailer is provided with a trailer structure and at least two shafts that are disposed in a structural zone in the rear part. According to the technical scheme, it is provided that the trailer body (4) is designed in the manner of an upright removable bridge, that an independently mobile, in the lower rear body section from below to the trailer body (4) and decoupled and lockable trailer modules (5th 26; 34) on which the at least two axles (9, 10; 31, 32, 33; 35) are arranged, and in that at least one axis of the trailer axle module (5; 26; 34) as drive module andtemporary drive axle ( 9; 31) of the train combination (1) is designed with a drive unit which can be controlled automatically by means of a control unit in dependence on the determined driving operating state and the determi