An apparatus generates position signals to indicate the position of a rail-bound vehicle along a travel way throughout which travel way many markings are located. The apparatus includes at least one sensor located on the vehicle for scanning the markings and outputting signals and an evaluation unit that is connected to the sensor for generating the position signals by evaluating the signals generated by the sensor by scanning the markings. When the vehicle passes a marking, the sensor outputs a “marking present” signal and otherwise outputs a “marking absent” signal. The vehicle has a receiver of a navigation system that is connected to the evaluation unit and outputs current location signals. The evaluation unit is connected to a memory device (20) for storing position data associated with the markings, where, upon receiving each “marking present” signal, the evaluation unit outputs a position signal associated with the marking based on a comparison of the current location signal and the memory-stored position data.