Patent ID: 7532976

Claim:
A method of detecting whether at least one toll road section is being used by a vehicle (FAR), wherein the position of said vehicle (FAR) is determined by means of at least one position calculating system (POS) and the determined position is implemented to ascertain whether the road section being used is a toll road section, and wherein said vehicle (FAR) has a transmitter/receiver unit (SEE) that is adapted to exchange data (DAT) with a cellular radio network (FUN), and to each cell (ZEL) of said radio network (FUN) at least one cell identifier (ZID) is assigned, and when there is at least partial failure of the position calculating system (POS) said at least one cell ID (ZID) is implemented to ascertain whether the road section being used by said vehicle (FAR) is a toll road section, characterized in that each cell assigned to a toll road section is weighted by a weight characteristic of the relevance of said cell for recognition of said toll road section.