Lightweight trains ride on rails mounted on a elevated hollow concrete box girder; each car has a square plate protruding into the box girder through a longitudinal slit that is sealed with rubber flaps.
Lightweight trains ride on rails. These rails are mounted on a elevated hollow concrete box girder. Each car has a square plate. This square plate is protruding into the box girder through a longitudinal slit. This longitudinal slit is sealed with rubber flaps.