Cant,Equilibrium Speed and Cant Excess

Cant:It is the amount by which one rail is raised above the other rail.It is positive when the outer rail on a curved track is raised above inner rail and is negative when the inner rail on a curved track is raised  above the outer rail.

Equilibrium Speed: It is the Speed at which centrifugal force developed during movement of the vehicle on a curved track is exactly balanced by the cant Provided.

Cant Excess:It happens when a train travels on curve at a speed lower than equilibrium speed