Distance security method for trains

The method involves trains receiving information by radio from a control centre managing the stretch of track and/or from preceding trains regarding the fee stretch of track ahead. Trains transmit their desired axle count (SA Z1) and identity (J Z1) to radio axle counters (A1,A2) along the track that count the actual number of axles, store or compare this with the desired number and form an identifier (K Z1) if the numbers coincide. A following train (Z2) requests information regarding the preceding train (Z1) at the latest on reaching the braking point for the sensors. If the preceding train has completely passed, the counter transmits the desired and actual axle numbers or identifier to the following train, which concludes that the track is fee to the next sensor or busy.