Question

A road is provided with a horizontal circular curve having deflection angle of 55° and centre line radius of 250 m. a transition curve is to be provided at each end of the circular curve of such a length that the rate of gain of radial acceleration is 0.3 m/s3 at a speed of 50 km per hour. length of the transition curve required at each of the ends is 2.57 m 33.33 m 35.73 m 1666.67 m

Answer 1

Formula:

L = v^3/(c*R).

Here, c = o.3 m/s.

v = 13.88888888 m/s.

R = 250.

Hence, L = 13.88888888^3/(0.3*250).

= 35.73.