Inward tilting of rails by 1 in 20. The wheel-set was first assembled by mounting the wheels symmetrically on to the axle at a clear spacing of 1600 mm, in accordance with the specifications. The wheel-set was further mounted on to the rails, aligning the wheels to travel in the forward direction of the rails, as shown in figure 2. The movement of wheels were allowed only in the longitudinal direction of rails, and the movements in the lateral and vertical directions were constricted. The implementation of high speed railways in India are in their early phases and vast studies are being conducted for the effective implementation of the system. Maintaining the traction required for efficient operation of trains at high speeds requires the net minimum frictional coefficient to be maintained at the wheel-rail interface.