Repeat Problem 15-19 for an urban freeway in rolling terrain.
What will be an ideal response?
(a) Find the minimum radius
R = u2 / [ 15(e + fs)]
R = (502/15) (1/(e + fs))
R = 166.7 / (e + fs)
Assuming emax = 0.08 and fs = 0.14
Rmin = 166.7 / (0.08 + 0.14) = 758 ft
(b) Using Equation 15.12, L = kA
From Table 15.4, K = 84
L = 84 (5 – (–5))
L = 840 ft
(c) Using Equation 15.12, L = kA
From Table 15.5, K = 96
L = 96 (5 – (–5))
L = 960 ft
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