Question

For a road with camber of 3% and the design speed of 80 km/hr, the minimum radius of the curve beyond which NO superelevation is needed is

• A. 1680 m
• B. 948 m
• C. 280 m
• D. 406 m

Answer 1

The correct option is B 948 m

Taking camber as super elevation,

$\therefore e=\frac{3}{100}=0.03$

$0.03=\frac{V^2}{225R}$

$\Rightarrow 0.03=\frac{(80{)}^2}{225R}$

$\therefore R=948.14m$