GATE CE 2017 Set 1 — Question 16
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Transportation Engineering → Horizontal & Vertical Alignment → Superelevation
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Question
A super-elevation is provided on a circular horizontal curve such that a vehicle can be stopped on the curve without sliding. Assuming a design speed and maximum coefficient of side friction , which one of the following criteria should be satisfied?
Correct answer
(A) e ≤ fₘₐₓ
Solution
To prevent a stationary vehicle () from sliding down the slope of a super-elevated curve, the component of gravity pulling it down the slope must be balanced by the frictional force.
Since , the condition is .
Since , the condition is .
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