GATE CE 2021 Set 1 — Question 25
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Transportation Engineering → Horizontal & Vertical Alignment → Superelevation
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Question
A highway designed for speed has a horizontal curve section with radius . If the design lateral friction is assumed to develop fully, the required super elevation is
Correct answer
(B) 0.05
Solution
The relationship for super elevation is given by , where is the speed in km/h, is the radius in meters, is the super elevation, and is the lateral friction coefficient. Given and . Assuming the design lateral friction is fully developed: . Therefore, .
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