Apparatus, system and method for assisting a driver in forming a vehicle train

Device (3), system (10) and method for assisting a driver of a first vehicle (1) in forming a vehicle combination with a second vehicle (2). The device (3) is configured to determine a position parameter and a rate parameter of the second vehicle. The device (3) is further configured to determine a speed change △ v Based on the determination, the apparatus (3) for informing the driver of the first vehicle (1) about the possibility of forming a vehicle train is configured.