What is the recommended clear zone distance for the


What is the recommended clear zone distance for the following roadway situations? (Use the Clear Zone nomograph to find solutions)

a. ADT = 2,500 vpd Design speed = 60 mph Slope = 5:1 (cut) Degree of curvature = none

b. ADT = 15,000 vpd Design speed = 50 mph Slope = 6:1 (cut) Degree of curvature = 5°

c. ADT = 1,600 vpd Design speed = 40 mph Slope = 4:1 (fill) Degree of curvature = 6°

(For b and c, indicate required clear zone width on outside of curve, and on inside of curve.)

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Civil Engineering: What is the recommended clear zone distance for the
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