DEVICE FOR BRIEFLY BRIDGING THE FAILURE OF THE SATELLITE NAVIGATION SIGNAL FOR DUAL SATELLITE-NAVIGATION BASED TOLL SYSTEMS

摘要

The invention relates to a method for electronically charging tolls, whereby actual position coordinates (OKO) of a vehicle are determined by means of at least one position fixing system, in order to determine if a toll road segme nt has been taken. Said position coordinates (OKO) are determined at least temporarily by means of a satellite-aided position fixing system (SGS). At least one signature (SIG), which is characteristic of the road segment taken by said vehicle, is calculated by means of said position coordinates of the vehicle (FA1, FA2). Said signature (SIG) permits the determination of whethe r the road segment taken is a toll road segment or not. At least in case of partial failure of said satellite-aided position fixing system (SGS), the position coordinates are determined by means of an inertial navigation syste m (TNS).