answer question 21 only You have designed a vertical crest curve which joins a +3% grade and a -4% grade. The design speed is 60 mph and you have determined the curve to be 1100 ft long. Now, you need to determine the layout of the curve when the BVC is located at station 12+50 ft and has an elevation of 825 ft.17. What is the stationing (ft) of the PVI?18. What is the elevation (ft) of the PVI?19. What is the stationing (ft) of the EVC?20. What is the elevation (ft) of the EVC?21. What is the vertical distance (ft) between the PVI and the road surface?22. What is the elevation (ft) of the road surface at the same stationing as the PVI?23. What is the elevation (ft) of the road surface at station 14+00?24. What is the stationing (ft) of the high point of the road?25. What is the elevation (ft) of the high point of the road?

Answered: You have designed a vertical crest…

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 21P

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answer question 21 only

You have designed a vertical crest curve which joins a +3% grade and a -4% grade. The design speed is 60 mph and you have determined the curve to be 1100 ft long. Now, you need to determine the layout of the curve when the BVC is located at station 12+50 ft and has an elevation of 825 ft.

17. What is the stationing (ft) of the PVI?

18. What is the elevation (ft) of the PVI?

19. What is the stationing (ft) of the EVC?

20. What is the elevation (ft) of the EVC?

21. What is the vertical distance (ft) between the PVI and the road surface?

22. What is the elevation (ft) of the road surface at the same stationing as the PVI?

23. What is the elevation (ft) of the road surface at station 14+00?

24. What is the stationing (ft) of the high point of the road?

25. What is the elevation (ft) of the high point of the road?

Expert Solution

Step 1

Elevation surveys are used to accurately represent a building's facade. A distance of half the length separates BVC and PVI, PVI and EVC. As a crest vertical curve, PVI has a higher elevation than BVC and EVC

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