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15. Calculate the minimum length (ft) of curve to sat the appearance criterion.

15. Calculate the minimum length (ft) of curve to sat the appearance criterion.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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answer question 15 only

You are designing a vertical sag curve joining a -3% grade to a + 2% grade. The design speed is 60 mph. For the design of the curve, the stopping sight distance is based on a 0% grade.
Transcribed Image Text:You are designing a vertical sag curve joining a -3% grade to a + 2% grade. The design speed is 60 mph. For the design of the curve, the stopping sight distance is based on a 0% grade.
9. Assuming 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the stopping sight distance (ft)? 10. Assuming S>L, calculate the minimum length (ft) of curve. 11. Does the S>L condition hold true? YES or NO 12. Assuming S<L, calculate the minimum length (ft) of curve. 13. Does the S<L condition hold true? YES or NO 14. Calculate the minimum length (ft) of curve to satisfy the comfort criterion. 15. Calculate the minimum length (ft) of curve to sat the appearance criterion. 16. What minimum length (ft) of curve will satisfy the safety, comfort and appearance criteria?
Transcribed Image Text:9. Assuming 0% grade, and AASHTO's recommended perception reaction time and recommended deceleration rate, what is the stopping sight distance (ft)? 10. Assuming S>L, calculate the minimum length (ft) of curve. 11. Does the S>L condition hold true? YES or NO 12. Assuming S<L, calculate the minimum length (ft) of curve. 13. Does the S<L condition hold true? YES or NO 14. Calculate the minimum length (ft) of curve to satisfy the comfort criterion. 15. Calculate the minimum length (ft) of curve to sat the appearance criterion. 16. What minimum length (ft) of curve will satisfy the safety, comfort and appearance criteria?
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