For a bicycle path with an average speed of 20 mi/h, a maximum superelevation of 2%, and a total change in grade of 10%, determine the minimum radius of horizontal curvature and the minimum length of the vertical curve.
What will be an ideal response?
The radius can be found:
R = u2 / [15(e + fs)]
Assume fs = 0.30
R = (20)2 / [15(0.02 + 0.30)]
R = 83.33 ft
From Figure 15.32, for a design speed of 20 mi/h, L = 180 ft
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