In 2006, the German maglev train test run controlled way car collided with a repair, the report said a total of 29 people on board, 23 people died on the spot, the actual death of 25 people, four of them seriously. This shows that the maglev train in case of sudden braking capability is not reliable, as wheel-rail trains. Transportation on land without wheels is very dangerous. Greatly reduced because of the momentum from the stationary train, to overcome a lot of inertia of the wheels and the track only a braking force to overcome. Maglev trains without wheels, if a sudden power outage, by sliding friction is very dangerous. In addition, the maglev train is elevated, an accident at 5 meters high and rescue very difficult, no wheels (some maglev train with wheels), drag the scene difficult; if interval power outages, other vehicles, crane also difficult close.