Homework 10 - CEE 122 Traffic Engineering Spring 2010...

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CEE 122 Traffic Engineering Spring 2010 Homework #10 Due: __________________ 1. A one mile segment of new freeway is being planned through an urban area with an average grade of +4% and a forecast AADT of 75,000 veh/day. The directional split is anticipated as 55/45, and the forecast peak hour factor (K) is 0.090. What is the minimum number of lanes needed to provide at least LOS D during the peak hour? Assume FFS=70 mph, commuter traffic, PHF = 0.90, 10 percent trucks, and 0 percent RVs. 2. For an analysis of freeway capacity and level of service, identify the eight conditions corresponding to an idealized speed-flow-density-relationship that need to exist so that the freeway is co nsidered to operate under “base conditions”. 3. Draw a simple line sketch to illustrate the 4 different types of freeway segments according to Highway Capacity Manual (HCM) analysis methodology: (1) Basic segment; (2) Merge or On segment; (3) Diverge or Off segment; and (4) Weaving segment. 4.
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Homework 10 - CEE 122 Traffic Engineering Spring 2010...

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