Control system, which is adapted for application in a vehicle and intended to detect following vehicles on the basis of environmental data which are obtained from one or several environmental sensors disposed on the vehicle. The environmental sensors are adapted to provide an electronic controller of the control system with the environmental data which reflect the area in front of, laterally next to and/or behind the vehicle. The control system is at least adapted and intended to detect one or several other vehicles participating in traffic behind the own vehicle with the environmental sensors. A lane associated with each other vehicle, in which the other vehicle(s) drive(s), is detected. An occupancy of the own lane and/or of at least one adjacent lane by the other vehicle(s) is determined. On the basis of the determined occupancy (i) a corresponding indication about the occupancy of the own lane and/or of the at least one adjacent lane is output, (ii) an indication on a safe or unsafe lane change to a specific of the at least one adjacent lane is output and/or (iii) an autonomous lane change to the specific of the at least one adjacent lane is performed by the own vehicle if the determined occupancy allows a safe change of lane.