Recommended_Homework_Solution_Set

Recommended_Homework_Solution_Set - Textbook Problem 2.18...

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Recommended Homework Problems – Week 9 CE 221 – INTRODUCTION TO TRANSPORTATION ENGINEERING Instructor Problem 1. Consider a traffic stream of 1,000 vph consisting of 10% trucks, 3% buses, and 2% RVs moving over rolling terrain. What is the total number of equivalent passenger cars per hour in the traffic stream? 1215 pcph Instructor Problem 2. A new suburban facility is being planned. Planners estimate 2,520 vph in the peak direction, rolling terrain, and 10% trucks, 0% buses, 0% RVs. It will be an undivided highway with 6 access points per mile, 12-foto lanes, and 6-foot shoulders. The BFFS = 55 mph. How many lanes are needed to provide LOS C? With this number of lanes, what will be the peak period speed and density? 6-lanes, 51.9 mph, 20.7 pc/mi/ln Textbook Problem 2.5 – volumes, flow rates, average headways veh; 1078.9 vph & 3.34 sec/veh;
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Unformatted text preview: Textbook Problem 2.18 – space mean speed SMS = 64.3 mph or 102.9 kph Textbook Problem 2.32 – speed-flow relationships FFS = 49.4 mph, Speed at qmax = 18.2 mph, qmax = 1272 vph, Density at qmax = 70 veh/mi Textbook Problem 2.34 – Greenshield’s model A: 116.67 pcpmpl, 4666.7 pcphpl, 4687.50 pcphpl, 1.00. B: 50 mph, 20 mph, 3125 pcphpl, 0.96. C: 48 mph, 2400 pcphpl, 3750 pcphpl, 0.64. D: 61.46 mph, 36.61 pcpmpl, 2250 pcphpl, 4500 pcphpl, 0.50. Textbook Problem 2.36 – traffic flow, Greenshield’s 2954.32 pcphpl * 2 lanes = 5908.6 pcph. Textbook Problem 3.11 – freeway capacity analysis A: 3436 vph. B: LOS E. Textbook Problem 3.18 – queuing 58.3 veh-hrs Textbook Problem 3.19 – incident and queuing analysis B: ~1:30 pm. C: at t = 63 min, 945 vehicles, max delay = 26.4 min....
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This note was uploaded on 05/11/2008 for the course CE 221 taught by Professor Staff during the Winter '04 term at Cal Poly.

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