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Calculate the extra widening of pavement needed on a two lane highway having a longitudinal circular curve of radius 300 m. Design speed = 80 kmph, length of wheel base of largest vehicle = 6 m.
  • a)
    0.6 m
  • b)
    0.8 m
  • c)
    1.2 m
  • d)
    0.4 m
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Calculate the extra widening of pavement needed on a two lane highway...
Given,
N = 2 R = 300 m
L = 6 m V = 80 km/hr
Extra width required on curves = NL2 / 2R = 0.105V / √ R
= 2×62 / 2×300 = 0.105×80 / √ 300
= 0.605 say 0.6 m.
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Most Upvoted Answer
Calculate the extra widening of pavement needed on a two lane highway...
Calculation of Extra Widening of Pavement on a Two Lane Highway

Given parameters:
Radius of longitudinal circular curve = 300 m
Design speed = 80 kmph
Length of wheelbase of largest vehicle = 6 m

Formula:
Extra widening of pavement = (V² * WB)/(127 * R)

Where,
V = Design speed in kmph
WB = Length of wheelbase of largest vehicle in meters
R = Radius of longitudinal circular curve in meters

Calculation:
Converting design speed from kmph to m/s:
80 kmph = 22.22 m/s

Substituting the values in the formula:
Extra widening of pavement = (22.22² * 6)/(127 * 300)
Extra widening of pavement = 0.6 m

Therefore, the extra widening of pavement needed on a two lane highway having a longitudinal circular curve of radius 300 m is 0.6 m.
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Calculate the extra widening of pavement needed on a two lane highway having a longitudinal circular curve of radius 300 m. Design speed = 80 kmph, length of wheel base of largest vehicle = 6 m.a)0.6 mb)0.8 mc)1.2 md)0.4 mCorrect answer is option 'A'. Can you explain this answer?
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Calculate the extra widening of pavement needed on a two lane highway having a longitudinal circular curve of radius 300 m. Design speed = 80 kmph, length of wheel base of largest vehicle = 6 m.a)0.6 mb)0.8 mc)1.2 md)0.4 mCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Calculate the extra widening of pavement needed on a two lane highway having a longitudinal circular curve of radius 300 m. Design speed = 80 kmph, length of wheel base of largest vehicle = 6 m.a)0.6 mb)0.8 mc)1.2 md)0.4 mCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Calculate the extra widening of pavement needed on a two lane highway having a longitudinal circular curve of radius 300 m. Design speed = 80 kmph, length of wheel base of largest vehicle = 6 m.a)0.6 mb)0.8 mc)1.2 md)0.4 mCorrect answer is option 'A'. Can you explain this answer?.
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