Abstract: A method for determining route data, in particular geographical coordinates (P1, P2 . . . Px, Px1 . . . Pn) and route distances (S1, S2 . . . Sx1 . . . Sn-1) for frequently traveled routes, wherein position data of a vehicle along a route are measured both with an external route transmitter and with an internal route transmitter. To reduce margins of error of the route data, the externally and internally measured position data of several trips and/or vehicles are compared with each other for characteristic points along the route, in particular stops (P1, P2 . . . Px, Px1 . . . Pn), and statistically evaluated, and the evaluated data are provided to the internal route transmitter as route data.