Civil Engineering - GATE Exam Questions - Discussion

20. 

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

[A]. 2.57 m
[B]. 33.33 m
[C]. 35.73 m
[D]. 1666.67 m

Answer: Option C

Explanation:

No answer description available for this question.

Michael Lalawmpuia said: (Feb 4, 2015)  
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.

Nandeesh said: (Sep 28, 2020)  
V=(5/18)*50 = 13.89m/s.

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.

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