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A highway designed for 80 km/h speed has a horizontal curve section with radius 250 m. If the design lateral friction is assumed to develop fully, the required super elevation is 
  • a)
    0.02
  • b)
    0.05
  • c)
    0.09
  • d)
    0.07 
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A highway designed for 80 km/h speed has a horizontal curve section wi...
Speed of vehicle = V = 80 kmph
Radius of Curve R = 250 m
We know that, 

Hence, the correct option is (B). 
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Community Answer
A highway designed for 80 km/h speed has a horizontal curve section wi...
Calculation of required super elevation:
- The formula for calculating the required super elevation is:
\[ \text{e} = \frac{v^2}{g \cdot r} \]
Where:
- \( e \) = super elevation (m)
- \( v \) = design speed (m/s)
- \( g \) = acceleration due to gravity (9.81 m/s\(^2\))
- \( r \) = radius of the curve (m)

Given data:
- Design speed = 80 km/h = 22.22 m/s
- Radius of the curve, \( r \) = 250 m

Calculation:
\[ e = \frac{(22.22)^2}{9.81 \times 250} = 0.050 \]

Conclusion:
- The required super elevation is 0.05 or 5%. Therefore, the correct answer is option B.
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A highway designed for 80 km/h speed has a horizontal curve section with radius 250 m. If the design lateral friction is assumed to develop fully, the required super elevation isa)0.02b)0.05c)0.09d)0.07Correct answer is option 'B'. Can you explain this answer?
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