The railway track is carried in a concrete box over which , inside the box the the railway wheels with electic motors run using the same under-frame used in railway coach, to which the coach you can see suspended, transferring the load to the frame at the same points as done in railway coach. The suspenders travel between the two rails of the track. Positive connection is now provided between the railway track and the running wheels- there is no possibility of the coach going out of control!