Question

The extra widening required for a two-lane National Highway at a horizontal curve of 300 m radius, considering a wheel base of 8 m and a design speed of 100 kmph is

• A. 0.42 m
• B. 0.62 m
• C. 0.92 m
• D. 0.82 m

Answer 1

The correct option is D 0.82 m

The extra widening is given by

$E_w=\frac{n{L}^2}{2R}+\frac{V}{9.5\sqrt{R}}$

$=\frac{2\times (8{)}^2}{2\times 300}+\frac{100}{9.5\sqrt{300}}=0.82m$