The invention relates to a method for communication on the basis of an, in particular wireless, motor vehicle communication system interacting in an ad-hoc manner, wherein the communication takes place between road users themselves and / or between road users and traffic infrastructure, in which, in the vicinity of a node for traffic routes, particularly junctions or intersections between traffic routes such as road or rail junctions, a radio transmission / radio reception device associated with a first road user continuously sends a message to at least one second radio transmission / radio reception device, which is situated in the radio coverage area of the first radio transmission / radio reception device and is associated with a device for the traffic infrastructure, the message is sent such that, on the basis of the received message, for each manoeuvre that is possible at the node, at least one value correlating to a probability of execution of the manoeuvre at the node is ascertained, and the road users are controlled on the basis of the correlating value. The invention also relates to a device for the traffic infrastructure and to a road user device having means for carrying out the method.