Civil Engineering MCQAE Level Civil Engineering
As per IRC:73, the minimum radius of horizontal curve for a National Highway in plain terrain (design speed 100 km/h, e_max = 0.07, f = 0.15) is approximately:
Transportation EngineeringHighway Geometric DesignHARD
Choose the correct answer
A
230 m
B
360 m
C
510 m
D
760 m
Correct Answer
B. 360 m
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R_min = V²/[127(e+f)] = 100²/[127×0.22] = 10000/27.94 ≈ 360 m. Higher design speeds require larger minimum radii to maintain vehicle stability.
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