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Authors:
Fred L. Mannering, Scott S. Washburn
Chapter:
Geometric Design Of Highways
Exercise:
Problems
Question:5 | ISBN:9781118120149 | Edition: 5

Question

An equal-tangent crest curve has been designed for 70 mi/h to connect a +2% initial grade and a -1% final grade for a new vehicle that has a 3 ft driver’s eye height; the curve was designed to avoid an object that is 1 ft high. Standard practical stopping distance design was used but, unlike current design standards, the vehicle was assumed to make a 0.5g stop, although driver reactions are assumed to be the same as in current highway design standards. If the PVC of the curve is at elevation 848 ft and station 43 + 48, what is the station
and elevation of the high point of the curve?

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