ATB-Vv (Verbeterde versie "English:" "Improved version") is the latest evolution of ATB-Plus-Plus. It is enhanced with three beacons in distance of 120, 30 and 3 m before the attributed signal, using technology comparable with German PZB. After activation by ATB-Vv the movement of the train is self-controlled with regard to the braking curve. So the chance of a ""Stoptonend Sein (STS)-passages"" (English: Signals Passed At Danger) is minimal. The system is not fail-safe as a broken beacon will result in the train not braking automatically.