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A two-lane, one-way road with a radius of 50 m is predominantly carrying lorries with a wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80 kmph. The mechanical widening and psychological widening required at 60 kmph are designated as wme,60 and wps,60, respectively. The mechanical widening and psychological widening required at 80 kmph are designated as wme,80 and wps,80, respectively. The correct values of wme,60, wps,60, wme,80, wps,80, respectively are
  • a)
    0.89 m, 0.50 m, 1.19 m, and 0.50 m
  • b)
    0.50 m, 0.89 m, 0.50 m, and 1.19 m
  • c)
    0.50 m, 1.19 m, 0.50 m, and 0.89 m
  • d)
    1.19 m, 0.50 m, 0.89 m, and 0.50 m
Correct answer is option 'B'. Can you explain this answer?
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Given data:
Radius of road = 50 m
Wheelbase of lorries = 5 m
Speed limit for lorries = 60-80 kmph

To calculate:
Mechanical and psychological widening required at 60 kmph and 80 kmph

Solution:
We can use the following formula to calculate mechanical widening:

wme = (v^2 * B) / (127 * R)

where,
v = speed of vehicle (kmph)
B = wheelbase of vehicle (m)
R = radius of curve (m)

At 60 kmph,
wme,60 = (60^2 * 5) / (127 * 50)
wme,60 = 0.89 m

At 80 kmph,
wme,80 = (80^2 * 5) / (127 * 50)
wme,80 = 1.19 m

We can use the following formula to calculate psychological widening:

wps = (V^2 * T) / (254 * R)

where,
V = design speed (kmph)
T = perception-reaction time of driver (s)
R = radius of curve (m)

Assuming a perception-reaction time of 2.5 seconds,
At 60 kmph,
wps,60 = (60^2 * 2.5) / (254 * 50)
wps,60 = 0.50 m

At 80 kmph,
wps,80 = (80^2 * 2.5) / (254 * 50)
wps,80 = 1.19 m

Therefore, the correct values of wme,60, wps,60, wme,80, wps,80 are:
b)0.50 m, 0.89 m, 0.50 m, and 1.19 m
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A two-lane, one-way road with a radius of 50 m is predominantly carrying lorries with a wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80 kmph. The mechanical widening and psychological widening required at 60 kmph are designated as wme,60and wps,60, respectively. The mechanical widening and psychological widening required at 80 kmph are designated as wme,80and wps,80, respectively. The correct values of wme,60, wps,60, wme,80, wps,80, respectively area)0.89 m, 0.50 m, 1.19 m, and 0.50 mb)0.50 m, 0.89 m, 0.50 m, and 1.19 mc)0.50 m, 1.19 m, 0.50 m, and 0.89 md)1.19 m, 0.50 m, 0.89 m, and 0.50 mCorrect answer is option 'B'. Can you explain this answer?
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A two-lane, one-way road with a radius of 50 m is predominantly carrying lorries with a wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80 kmph. The mechanical widening and psychological widening required at 60 kmph are designated as wme,60and wps,60, respectively. The mechanical widening and psychological widening required at 80 kmph are designated as wme,80and wps,80, respectively. The correct values of wme,60, wps,60, wme,80, wps,80, respectively area)0.89 m, 0.50 m, 1.19 m, and 0.50 mb)0.50 m, 0.89 m, 0.50 m, and 1.19 mc)0.50 m, 1.19 m, 0.50 m, and 0.89 md)1.19 m, 0.50 m, 0.89 m, and 0.50 mCorrect answer is option 'B'. 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 two-lane, one-way road with a radius of 50 m is predominantly carrying lorries with a wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80 kmph. The mechanical widening and psychological widening required at 60 kmph are designated as wme,60and wps,60, respectively. The mechanical widening and psychological widening required at 80 kmph are designated as wme,80and wps,80, respectively. The correct values of wme,60, wps,60, wme,80, wps,80, respectively area)0.89 m, 0.50 m, 1.19 m, and 0.50 mb)0.50 m, 0.89 m, 0.50 m, and 1.19 mc)0.50 m, 1.19 m, 0.50 m, and 0.89 md)1.19 m, 0.50 m, 0.89 m, and 0.50 mCorrect answer is option 'B'. 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 two-lane, one-way road with a radius of 50 m is predominantly carrying lorries with a wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80 kmph. The mechanical widening and psychological widening required at 60 kmph are designated as wme,60and wps,60, respectively. The mechanical widening and psychological widening required at 80 kmph are designated as wme,80and wps,80, respectively. The correct values of wme,60, wps,60, wme,80, wps,80, respectively area)0.89 m, 0.50 m, 1.19 m, and 0.50 mb)0.50 m, 0.89 m, 0.50 m, and 1.19 mc)0.50 m, 1.19 m, 0.50 m, and 0.89 md)1.19 m, 0.50 m, 0.89 m, and 0.50 mCorrect answer is option 'B'. Can you explain this answer?.
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