GATE Civil Engineering (CE) 2018 Shift 2 Solved Paper

Question : 54 of 65

Marks: +1, -0

7.5 {m}

wide two-lane road on a plain terrain is to be laid along a horizontal curve of radius

510 {m} .

For a design speed of

100 {kmph}

, super-elevation is provided as per IRC:

73-1980

. Consider acceleration due to gravity as

9.81 {m} \/ {s}^{2} .

The level difference between the inner and outer edges of the road (in

{m}

, up to three decimal places) is __________.

Solution:

e \;\; =\;{V^{2}}/{225 R}=\;{100^{2}}/{225 × 510}=0.0871 × 0.007

=\tan θ

\sin θ \;\; =6.99 × 10^{-3}

x \;\; =7.5 × \sin θ=0.0525 {m}

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