A two-lane highway is being designed for a speed of 60 mi/h. At one horizontal curve, it is known that the superelevation is 7.0% and the coefficient of side friction is 0.10. Use 1.467 as conversion factor from mi/h to ft/sec, and useg = 32.2 ft/sec². Determine: 1. the minimum radius of curve R, (measured up to the vehicle path at the middle of inner lane) that will provide for safe vehicle operation based on superelevation 2. Length of Curve L of the road itself if subtended angle A=80° and the width of one lane is 12 ft (Hint. R is different from R,)
A two-lane highway is being designed for a speed of 60 mi/h. At one horizontal curve, it is known that the superelevation is 7.0% and the coefficient of side friction is 0.10. Use 1.467 as conversion factor from mi/h to ft/sec, and useg = 32.2 ft/sec². Determine: 1. the minimum radius of curve R, (measured up to the vehicle path at the middle of inner lane) that will provide for safe vehicle operation based on superelevation 2. Length of Curve L of the road itself if subtended angle A=80° and the width of one lane is 12 ft (Hint. R is different from R,)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A two-lane highway is being designed for a speed of 60 mi/h. At one
horizontal curve, it is known that the superelevation is 7.0% and the
coefficient of side friction is 0.10. Use 1.467 as conversion factor
from mi/h to ft/sec, and use g = 32.2 ft/sec2.
%3D
Determine:
1. the minimum radius of curve R, (measured up to the vehicle path
at the middle of inner lane) that will provide for safe vehicle
operation based on superelevation
2. Length of Curve L of the road itself if subtended angle A=80°
and the width of one lane is 12 ft (Hint. R is different from R.)
Do not round off intermediate values. Express your final answer in
one decimal place only, with the correct units. Box your final answer.
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