Traffic and Highway Engineering
Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Part 3: Signal Design Problem For this exercise, refer to the intersection diagram below in answering the following questions. 525 200 350 40 30 25 50 270 575 175 N Assume the following: Saturation flow rate per lane 1800 veh/h (for protected movements) ⚫ Saturation flow rate per lane = 700 veh/h (for any lane with permitted movements) • Start-up lost time/phase: 2 sec Clearance lost time/phase = 2 sec • Lane widths: Thru: 12 ft • Speeds: Left turn: 11 ft E/W: 45 mph N/S: 35 mph ⚫ Vehicle length: 20 ft • Level grade • Eff. crosswalk width = 8 ft ⚫ # of crossing pedestrians/phase = 15 3
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Transcribed Image Text:Part 3: Signal Design Problem For this exercise, refer to the intersection diagram below in answering the following questions. 525 200 350 40 30 25 50 270 575 175 N Assume the following: Saturation flow rate per lane 1800 veh/h (for protected movements) ⚫ Saturation flow rate per lane = 700 veh/h (for any lane with permitted movements) • Start-up lost time/phase: 2 sec Clearance lost time/phase = 2 sec • Lane widths: Thru: 12 ft • Speeds: Left turn: 11 ft E/W: 45 mph N/S: 35 mph ⚫ Vehicle length: 20 ft • Level grade • Eff. crosswalk width = 8 ft ⚫ # of crossing pedestrians/phase = 15 3
Determine the following (for part f, determine for only the westbound approach): a) The signal phasing plan that will yield the minimum cycle length (assuming 95% capacity utilization) Hint: First determine N-S phasing possibilities and E-W phasing possibilities, and then consider possible combinations. b) "Optimal" cycle length c) Effective green times for each phase (for balanced v/c ratios), for minimum cycle d) Displayed yellow and all-red times for each phase e) Required pedestrian green times f) Average overall delay per cycle / Level of Service Project Report Guidelines Please submit a professional report (PDF version only) on CANVAS in accordance with the following guideline: 1. Your report should look professional and include the following at a minimum. You may add additional headings and subheadings as relevant to your project. a. Cover Page (include a title for your entire project and the names of all the team members) b. Table of Contents c. Executive Summary (explain the project including all the parts in less than 500 words) d. Part 1: Title of your Research Paper i. Introduction ii. Literature Review iii. Other Relevant Headings iv. Conclusion e. Part 2: LOS Analysis i. Problem Statement ii. Approach iii. Solution iv. Result/Conclusion f. Part 3: Signal Design Problem i. Problem Statement ii. Approach iii. Solution iv. Result/Conclusion g. Overall Conclusion (briefly recap what you did in parts 1, 2 and 3 and highlight the key findings) h. References (APA format) i. Appendix 2. Your entire report should be no more than 30 pages (including figures and tables but excluding references and appendix). This is not very long and you should be concise and to the point. 3. Please follow the rubric for the report at the end of this document and posted on canvas.
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Transcribed Image Text:Determine the following (for part f, determine for only the westbound approach): a) The signal phasing plan that will yield the minimum cycle length (assuming 95% capacity utilization) Hint: First determine N-S phasing possibilities and E-W phasing possibilities, and then consider possible combinations. b) "Optimal" cycle length c) Effective green times for each phase (for balanced v/c ratios), for minimum cycle d) Displayed yellow and all-red times for each phase e) Required pedestrian green times f) Average overall delay per cycle / Level of Service Project Report Guidelines Please submit a professional report (PDF version only) on CANVAS in accordance with the following guideline: 1. Your report should look professional and include the following at a minimum. You may add additional headings and subheadings as relevant to your project. a. Cover Page (include a title for your entire project and the names of all the team members) b. Table of Contents c. Executive Summary (explain the project including all the parts in less than 500 words) d. Part 1: Title of your Research Paper i. Introduction ii. Literature Review iii. Other Relevant Headings iv. Conclusion e. Part 2: LOS Analysis i. Problem Statement ii. Approach iii. Solution iv. Result/Conclusion f. Part 3: Signal Design Problem i. Problem Statement ii. Approach iii. Solution iv. Result/Conclusion g. Overall Conclusion (briefly recap what you did in parts 1, 2 and 3 and highlight the key findings) h. References (APA format) i. Appendix 2. Your entire report should be no more than 30 pages (including figures and tables but excluding references and appendix). This is not very long and you should be concise and to the point. 3. Please follow the rubric for the report at the end of this document and posted on canvas.
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Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning
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