Abstract: The invention relates to an apparatus in a vehicle (1) for producing and wirelessly transmitting messages to vehicles (11) which are set up to receive such messages, having a communication means (2) and activation means (3), where activation by the activation means (3) is used to transmit messages from the communication means (2) which comprise at least information about the position and speed of the vehicle (1). In line with the invention, the communication means (2) is in the form of part of a unit (5) in the vehicle for determining road tolls, the activation means (3) is in the form of a direction-of-travel indicator operating element, and the messages are sent to the vehicles (11) from the communication means (2) using a control center (6) which is set up to manage road tolls.