Question: 1 . A + 3 . 5 % grade intersects a - 1 . 9 % grade at PVI station 2 0 + 5 0

1. A +3.5% grade intersects a -1.9% grade at PVI station 20+50 and elevation1005.0 ft.a) Determine the minimum length of the vertical curve for a design speed of 50 mph. The vertical curve must provide the stopping sight distance (SSD) of 475 ft and meet the AASHTO criteria.

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