For a road with camber of 3% and the design speed of 80

Home » Highway Planning » Highway planning miscellaneous » 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

1. 1080 m
2. 948 m
3. 406 m
4. 280 m

Correct Option: B

e + f =	(0.75V)²
	127R

0.03 =	(0.75 × 80)²
	127 × R

∴ R = 9 uum