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Engineering · Civil Engineering
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a. (5 pts). On a curve section of Polytechnic Lane on a raining day, with a wet pavement, superelevation rate of 6%, friction factor of 0.20 and a 30 mph vehicle speed, what is the radius of the roadway? b. (10 pts). Using the information in Problem 1a, with a flat grade, deceleration rate of 11.2 ft/s, and a standard perception reaction time, what is the Safe Stopping Distance for a vehicle on this road? (25 pts). Using the Decision Sight Distance (DSD) equations, at 30 mph design speed, what are the DSD for c. i. (5 pts).Condition A: Stop on a rural road? ii. (5 pts). Condition B: Stop on an urban road? iii. (5 pts). Condition C: Speed/path/direction change on a rural road? iv. (5 pts). Condition D: Speed/path/direction change on a suburban road? v. (5 pts). Condition E: Speed/path/direction change on an urban road?
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