Method for communication between a vehicle communication device of a first vehicle and a plurality of roadside units by transmitting vehicle communication messages between the vehicle communication device of the first vehicle and the roadside units, the plurality of roadside units comprising at least a first roadside unit, a second roadside unit and a third roadside unit, a fork or crossroads at which the road branches into a first and a second route being arranged between the first and second roadside units (151, 152), the second roadside unit being arranged on the first route and the third roadside unit being arranged on the second route, the method comprising the following steps: - in a first step, a first vehicle communication message is transmitted from the first roadside unit to the vehicle communication device of the first vehicle, the first vehicle communication message comprising first token information, - in a second step following the first step, a second vehicle communication message is transmitted from the vehicle communication device of the first vehicle to the second roadside unit, either the second vehicle communication message comprising the first token information or the second vehicle communication message comprising second token information generated or modified by the vehicle communication device of the first vehicle on the basis of the previously received first token information, - in a fourth step preceding the first step, a fourth vehicle communication message is transmitted from the vehicle communication device or the vehicle to the first roadside unit, identification information unique to the vehicle class of the vehicle being transmitted to the first roadside unit by means of the fourth vehicle communication message, the first token information being generated as a function of the unique identification information, the first, second and fourth steps being performed analogously using a vehicle communication device of a second vehicle, a first vehicle communication message comprising first token information being transmitted from the first roadside unit to the vehicle communication device of the second vehicle and a second vehicle communication message being transmitted from the vehicle communication device of the second vehicle to the third roadside unit, receipt of the second vehicle communication message by the second roadside unit being used to establish use of the first route by the first vehicle and receipt of the second vehicle communication message by the third roadside unit being used to establish use of the second route by the second vehicle, it being determined what types of vehicles are using the first and the second route within a predefined timeframe, and in what numbers, by repeating the steps. - in a first step, a first vehicle communication message is transmitted from the first roadside unit to the vehicle communication device of the first vehicle, the first vehicle communication message comprising first token information, - in a second step following the first step, a second vehicle communication message is transmitted from the vehicle communication device of the first vehicle to the second roadside unit, either the second vehicle communication message comprising the first token information or the second vehicle communication message comprising second token information generated or modified by the vehicle communication device of the first vehicle on the basis of the previously received first token information, - in a fourth step preceding the first step, a fourth vehicle communication message is transmitted from the vehicle communication device or the vehicle to the first roadside unit, identification information unique to the vehicle class of the vehicle being transmitted to the first roadside unit by means of the fourth vehicle communication message, the first token information being generated as a function of the unique identification information, the first, second and fourth steps being performed analogously using a vehicle communication device of a second vehicle, a first vehicle communication message comprising first token information being transmitted from the first roadside unit to the vehicle communication device of the second vehicle and a second vehicle communication message being transmitted from the vehicle communication device of the second vehicle to the third roadside unit, receipt of the second vehicle communication message by the second roadside unit being used to establish use of the first route by the first vehicle and receipt of the second vehicle communication message by the third roadside unit being used to establish use of the second route by the second vehicle, it being determined what types of vehicles are using the first and the second route within a predefined timeframe, and in what numbers, by repeating the steps.