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3. (10 points) Determine the required minimum stopping sight distances (SSD) for the following highway design situations (Please use equations to calculate, and you may use AASTHO Green Book values

to verify your calculations): a. A level roadway section with a 70 mph design speed. b. A 4% downgrade with a design speed of 50 mph. c. A 4% upgrade with a design speed of 60 mph.

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