May 17 Daily Question: Length of Crest Curve Based on Stopping Distance

NCEES Civil PE Specification VI.B.: Basic vertical curve elements


Problem

You are driving in your brand-new Porsche that you purchased after switching from design to construction. You take a turn onto the pictured canyon crest curve that was designed for drivers to see deer up to 350 feet away. Based on the maximum sight distance given and grades shown in the figure, calculate the length of the curve.

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