Abstract: The invention describes an efficient transmission of data for making possible an accurate reconstruction of a path driven by a vehicle in a traffic network, a terminal unit, a central bureau and a process for informing (13) a central bureau (107) about a path, in particular for informing a central traffic bureau about a path traveled by a vehicle (101) with a terminal unit in a traffic network, wherein location data representing the respective location of the terminal unit (102) is repeatedly detected by a terminal unit (102) with a location detection device (20), wherein reference points (108 to 112) are defined at a plurality of locations by the terminal unit on the traveled path based on criteria present in the terminal unit, wherein reference point information relating to these reference points (108 to 112) is transmitted (13) from the terminal unit (102) to the central bureau (107).