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Highway Engineering - Engineering

Q1:

The total length of a valley formed by two gradients - 3% and + 2% curve between the two tangent points to provide a rate of change of centrifugal acceleration 0.6 m/sec2, for a design speed 100 km ph, is

A 16.0 m

B 42.3 m

C 84.6 m

D none of these.

ANS:C - 84.6 m

For c = 0.6
L=0.38√(NV^3)
Where v is in kmph.

So, here;
L = 0.38*(5*1000000)^0.5.