Which of the following brakes will be activated if you release the dead man's switch while driving?

The vigilance control system is a safety system that monitors the alertness and consciousness of the tram driver. Releasing the vigilance control signals a potential hazard to the vehicle (e.g., the driver becoming incapacitated), which automatically initiates the emergency braking procedure. In such a situation, the most effective braking systems are activated – the track and shoe brakes – to stop the tram in the shortest possible time.