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Unformatted text preview: CIVL 563 Traffic Control Fundamentals Homework 1 Due Date: March 17, 2010 ANSWER ALL FIVE QUESTIONS 1. An intersection approach has three lanes, permitted right turns, 8% right turns with a through vehicle equivalent of 4.50, and a saturation flow rate of 1750 vphgpl for through vehicles under prevailing conditions: a. What is the right-turn adjustment factor for the case described? b. Determine the saturation flow rate and saturation headway for the approach, including the impact of right-turning vehicles. c. If the approach has an effective green time of 45 seconds in a 75- second cycle length, what is the capacity of the approach in vph? 2. Consider a “4 by 4” intersection (two lanes on each approach), and assume that the lost time per phase is 4 sec, with 2.1 sec discharge headway a. Using the “time budget” approach, estimate the maximum number of vehicles that can be processed by this intersection in one hour, as a function of cycle length, for two-phase operation. Plot the range of function of cycle length, for two-phase operation....
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- Fall '10