GATE CE 2025 Set 2 — Question 64
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Transportation Engineering → Horizontal & Vertical Alignment → Extra Widening
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Question
On a two-lane highway, a horizontal curve of radius is provided. The design speed is .If the longest wheelbase of vehicle expected on this highway is , then the extra widening required (in m) is ______ (round off to two decimal places).
Correct answer
0.63 to 0.66
Solution
The total extra widening () required on a horizontal curve is the sum of mechanical widening () and psychological widening ():
1.Mechanical Widening ():
Where:- (Number of lanes)
- (Wheelbase length)
- (Radius of curve)
2.Psychological Widening ():
Where:- (Design speed)
3.Total Extra Widening ():
Rounding off to two decimal places, we get .Continue learning with Success Tracker
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