Civil Engineering MCQAE Level Civil Engineering

As per IRC 73, the ruling (design) gradient on plain/rolling terrain national highways is:

Transportation EngineeringHighway GradientMEDIUM

Choose the correct answer

A

1 in 20 (5%)

B

1 in 30 (3.3%)

C

1 in 50 (2%)

D

1 in 100 (1%)

Correct Answer

B. 1 in 30 (3.3%)

Why is this the answer?

IRC 73 ruling gradient for NH on plain and rolling terrain: 1 in 30 (3.3%). Limiting gradient: 1 in 15 (6.7%) for NH; exceptional gradient: 1 in 12.5 (8%). Steeper gradients require longer vehicles to use low gear and reduce capacity.

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