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Highway Engineering

Q1:

The correct formula for calculating superelevation for the hill roads, is

A

B

C

D

ANS:B -

@Shashikant.

Case-01. Equilibrium superelevation.
If fall centrifugal force is contracted by
Super elevation alone that is, f=0,
Hence, e+f =v^2/127R,
e = v^2/127R.

Case:2 Design superelevation:
V = 75% of design speed, f=0.
e+f =(0.75V)^2/127R
e = V^2/225.

So it is a max rate of superelevation for hill road.



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