Sub-problem 6a: Planning Analysis at Palouse River Drive
The Idaho Transportation Department has provided historic traffic volume data for U.S. 95 to help determine a historic growth rate. This data suggests a annual growth rate of 3.4 percent per year over the past 20 years, and 2.6 percent over the past 10 years.
The City of Moscow has provided planning model volumes that project 20-year traffic growth on the U.S. 95 corridor to be 50 percent over the next twenty years. Based on this information, what is the number of lanes required for the intersections along the U.S. 95 corridor in twenty years, assuming an annual traffic growth rate along the corridor of two percent?
In sub-problem 6a, we will use the planning analysis technique to evaluate conditions that occur when traffic is leaving a football game at the University of Idaho. Demand is high for about an hour after the conclusion of the game and the U.S. 95 corridor experiences a high level of congestion during this period.
Consider these questions:
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Will a planning analysis allow complex lane configurations?
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Should right turns be considered a separate movement or combined with through movements?
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What is the difference between volume and demand, and why is it important to distinguish between these two terms?
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Can the intersection operate at level of service F even when demand is less than capacity?
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What is the appropriate value of the duration of analysis parameter when demand exceeds capacity?
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When should multiple time periods be considered in a capacity and level of service analysis?
- What is the accuracy of the data used at the planning level? What does this suggest about the results?
Discussion:
Take a few minutes to consider
these questions. When you are ready, continue to the next page.