transpHW#4

transpHW#4 - cycle length Assume lost time per phase due to...

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CE 3113 Spring 2010 Homework 4 (100pts +20pts Bonus) Due 8 AM Feb. 11, 2010 1. (15pts) Determine the yellow interval for each approach of a 4-leg intersection given the following information: N-S  Approach E-W  Approach Median Width (ft) 14 18 Number of Lanes 2 1 Lane Width (ft) 14 12 Design Speed  (mph) 55 45 Grade (%) 1 0 2. (15pts) Using the information from Problem 7, determine the minimum green times for each approach if the effective crosswalk width in each direction is 11ft and the pedestrian traffic is 3200 peds/hr on the N-S approach and 1400 peds/hr on the E-W approach 3. (20pts) Page 379 8-9. It is not required to show the intersection geometry. Determine the sum of the green and yellow times for each phase as well as the total

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Unformatted text preview: cycle length. Assume lost time per phase due to acceleration and deceleration at phase changes as 3.5sec and that an all-red interval of 1.5sec is provided at each phase. 4. (15pts) Redo question 1 using the saturation flow rate 5% higher. What effect does this have on the cycle length? 5. (15pts) Redo question 1 using pedestrian flows that are 25% higher. What effect does this have on the cycle length? 6. (20pts) 10-2 on Page 528. BONUS (10pts each) 1. 8-12 2. 8-13 Do not just tell me one yields a shorter cycle length than the other. Thoroughly compare the two methods....
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transpHW#4 - cycle length Assume lost time per phase due to...

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