The maximum superelevation on hill roads should not exceed

Question

Question

This question was previously asked in

BPSC AE Paper 6 (Civil Engineering) 2019 Official Paper

Answer 1

Concept:

The centrifugal force exerted on the vehicles while traversing through the curves is counteracted by providing superelevation, which is given by:

\( \;e = \frac{{{V^2}}}{{127R}}\)

However, it is assumed that the centrifugal force is completely nullified if the vehicle is travelling at its 75% of the vehicle design speed.

∴ \( \;e = \frac{{{(0.75V)^2}}}{{127R}} = \frac{{{V^2}}}{{225R}}\)

According to IRC,