Abstract: A process for the specification of position data, in particular geographic coordinates, for several routes of at least one vehicle. In order to reduce the necessary volume of data, the routes are divided into partial routes such that route sections that are common to at least two routes form common partial routes, with at least one point of each partial route being used for the specification of position data.

Abstract: A method of automatically determining the position of vehicles by means of the DGPS (Differential Global Positioning System) is proposed, whereby at least one vehicle in the local public passenger traffic and one fixed station receive GPS data which characterize the distance to GPS satellites, where the data of the fixed station are transmitted as correction data 8 via service radio telegrams 5 to the mobile station 6 in the vehicles 1, and where the transmission of the correction data 8 takes place through expansion of the service radio telegrams 5 by at least one information byte 9.