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Highway Engineering - Engineering

Q1:

The absolute minimum radius of horizontal curve for a design speed 60 km ph is

A 131 m

B 210 m

C 360 m

D none of these.

ANS:D - none of these.

The Correct ans is 128.84 m.

In the case of the minimum radius or maximum superelevation, we use: (e+f)=v^2/127*R.

And in the case of the maximum radius or minimum super elevation, we use the design superelevation formula i.e. e=v^2 / 225*R.