Question

The superelevation for a rolling terrain on a curved portion of highway having radius 500 m and design speed 80 kmph in mixed traffic condition will be _____%
(Answer correct upto one decimal place)

• A. 5.7

Answer 1

The correct option is A 5.7
For mixed traffic condition,

$e=\frac{V^2}{225R}$

$=\frac{{80}^2}{225\times 500}=0.057$

$=5.7\%(\le 7\%,\text{hence OK})$