Superelevation !

Superelevation !

Why do we need to set the superelevation of outer rail of the curve? What factors are related to superelevation? Why should we limit the Inadequate superelevation and maximum superelevation of the outer rail ?

The purpose of setting the superelevation of outer rail of the curved is to generate a centripetal horizontal component force of the gravity of the locomotive and vehicle, to offset the inertial centrifugal force, achieve uniform force and vertical wear on the inner and outer steel rails, meet passenger comfort, and improve the stability and safety of the line.
Superelevation is related to the average speed and curve radius of each train.
Inadequate superelevation can cause uneven wear on the inner and outer rails and affect passenger comfort. In addition, excessive unbalanced superelevation may also cause train overturning, so it is necessary to limit Inadequate superelevation;

When low-speed trains travel on tracks with high superelevation, there is a risk of overturning, so it is necessary to limit the maximum outer rail superelevation.