Minimum railway curve radius


The minimum railway curve radius, the shortest allowable design radius for railway tracks under a particular set of conditions. It has an important bearing on constructions costs and operating costs and, in combination with superelevation (difference in elevation of the two rails) in the case of train tracks, determines the maximum safe speed of a curve.
According to the relationship between speed and tilt, for a balancing centripetal force,curve radius can be calculated.

Related formulas


rMinimum railway curve radius (m)
vSpeed (m/s)
gStandard gravity
θAngle by which the train is tilted due to the can (degrees)