A two-lane highway along the border has a horizontal curve segment with radius of 656 ft (measured to the centerline that separates the two opposing lanes). If the superelevation is 4% and f = 0.10, what should be the posted speed limit? With this speed what is the SSD? If the lane width is 12 ft and the border wall is located at 30 ft from the continuous while line that separates the inner lane and the right shoulder. Calculate the available sight distance of the driver. Is the sight distance adequate?
A two-lane highway along the border has a horizontal curve segment with radius of 656 ft (measured to the centerline that separates the two opposing lanes). If the superelevation is 4% and f = 0.10, what should be the posted speed limit? With this speed what is the SSD? If the lane width is 12 ft and the border wall is located at 30 ft from the continuous while line that separates the inner lane and the right shoulder. Calculate the available sight distance of the driver. Is the sight distance adequate?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A two-lane highway along the border has a horizontal curve segment with a radius of 656 ft (measured to the centerline that separates the two opposing lanes). If the superelevation is 4% and \( f = 0.10 \), what should be the posted speed limit? With this speed what is the SSD? If the lane width is 12 ft and the border wall is located at 30 ft from the continuous white line that separates the inner lane and the right shoulder. Calculate the available sight distance of the driver. Is the sight distance adequate?
Expert Solution
Step 1 Introduction and given data
A two-lane highway (separated) along the border has a horizontal curve
The radius of the curve = 656 ft
Superelevation, e = 0.04
Lateral friction, = 0.1
Lane width = 12 ft
The border wall is located 30 ft from the line that separates the inner lane and the right shoulder.
To determine
- Speed limit
- Required stopping sight distance
- Available sight distance
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