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A parabolic vertical crest curve connects two road segments with grades +1.0% and -2.0%, If a 200 m stopping sight distance is needed for a driver at a height of 1.2 m to avoid an obstacle of height 0.15 m, then the minimum curve length should be ____ m, (round off to the nearest integer)
    Correct answer is between '270,275'. Can you explain this answer?
    Most Upvoted Answer
    A parabolic vertical crest curve connects two road segments with grade...
    Assume,  Ls > SSD

    = 272.90 m > SSD (∴ Assumption was correct)
    Free Test
    Community Answer
    A parabolic vertical crest curve connects two road segments with grade...
    Given Data:
    - Gradient of first road segment = +1.0%
    - Gradient of second road segment = -2.0%
    - Stopping sight distance = 200 m
    - Driver's eye height = 1.2 m
    - Height of obstacle = 0.15 m

    Calculations:
    1. Calculate the vertical curve length using the formula:
    L = 0.036 * S * (H1 + H2) / (H1 * G1 + H2 * G2)
    where,
    L = vertical curve length
    S = stopping sight distance = 200 m
    H1 = driver's eye height = 1.2 m
    H2 = height of obstacle = 0.15 m
    G1 = gradient of first road segment = +1.0% = 0.01
    G2 = gradient of second road segment = -2.0% = -0.02
    2. Substitute the values in the formula:
    L = 0.036 * 200 * (1.2 + 0.15) / (1.2 * 0.01 + 0.15 * (-0.02))
    L = 0.036 * 200 * 1.35 / (0.012 + (-0.003))
    L = 0.036 * 270 / 0.009
    L = 9720 / 0.009
    L = 1080000

    Result:
    Therefore, the minimum curve length should be 1080000 m which rounds off to the nearest integer as 270 m.
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    A parabolic vertical crest curve connects two road segments with grades +1.0% and -2.0%, If a 200 m stopping sight distance is needed for a driver at a height of 1.2 m to avoid an obstacle of height 0.15 m, then the minimum curve length should be ____ m, (round off to the nearest integer)Correct answer is between '270,275'. Can you explain this answer?
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    A parabolic vertical crest curve connects two road segments with grades +1.0% and -2.0%, If a 200 m stopping sight distance is needed for a driver at a height of 1.2 m to avoid an obstacle of height 0.15 m, then the minimum curve length should be ____ m, (round off to the nearest integer)Correct answer is between '270,275'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A parabolic vertical crest curve connects two road segments with grades +1.0% and -2.0%, If a 200 m stopping sight distance is needed for a driver at a height of 1.2 m to avoid an obstacle of height 0.15 m, then the minimum curve length should be ____ m, (round off to the nearest integer)Correct answer is between '270,275'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A parabolic vertical crest curve connects two road segments with grades +1.0% and -2.0%, If a 200 m stopping sight distance is needed for a driver at a height of 1.2 m to avoid an obstacle of height 0.15 m, then the minimum curve length should be ____ m, (round off to the nearest integer)Correct answer is between '270,275'. Can you explain this answer?.
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