The cars have emergency brakes that stop the train in the event of a problem. The emergency brakes are irrevocable and once applied shall remain applied until the train comes to a complete stop. In addition, at any time the brake system is interlocked with the propulsion system and door control system. When a train is parted for any reason, the emergency brake is applied automatically and immediately. Furthermore, the system design does not permit unscheduled door opening between stations. It will apply emergency brake as well.