Answer :
Final answer:
The super elevation rate is 3.42% and the super elevation runoff is 0.04 feet.
Explanation:
To calculate the super elevation rate, we can use the formula:
Super Elevation Rate (in %) = (Design Speed^2) / (15 * Radius)
Given:
- Design Speed = 55 MPH
- Radius = 2,400 feet
Substituting the values into the formula:
Super Elevation Rate = (55^2) / (15 * 2,400) = 3.42%
To calculate the super elevation runoff, we can use the formula:
Super Elevation Runoff (in feet) = (Lane Width^2) / (15 * Radius)
Given:
- Lane Width = 12 feet
- Radius = 2,400 feet
Substituting the values into the formula:
Super Elevation Runoff = (12^2) / (15 * 2,400) = 0.04 feet
Learn more about calculating super elevation rate and runoff on a horizontal curve here:
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