Problem 3 - Page 1 of 1

ID# C103001

Problem 3: Analysis of oversaturated conditions - U.S. 95/Styner-Lauder Avenue Intersection

In the two previous problems, we considered traffic volumes only for the afternoon peak period. This allowed us to focus on several important issues relating to the application of the signalized and unsignalized intersection procedures of the Highway Capacity Manual. In problem 3, we recognize that there are other time periods and traffic conditions that also need to be considered. Just as we learned more about the signalization decision when we considered the U.S. 95 corridor and the related system issues beyond the single intersection of U.S. 95/Styner-Lauder Avenue, we will see that there is more to learn about the variation in traffic volumes, providing us with an even better perspective on the signalization decision.

The University of Idaho has a number of special events during the year that attract large crowds to its sporting arenas and performing arts venues. During these periods, demand often exceeds capacity along the U.S. 95 corridor in ways that do not happen during normal weekday periods. What tools are needed to assess the operation of the U.S. 95 corridor in general and the intersection of U.S. 95/Styner-Lauder Avenue in particular? And what analytical issues must be faced when demand exceeds capacity at a traffic facility? In sub -problem 3a, we will use the HCM methodologies to determine the level of service of the intersection under these high volume conditions. In sub-problem 3b, we will use a microscopic simulation model to assess these conditions. Finally, in sub -problem 3c, we will use another method, critical movement analysis, to determine whether the intersection can accommodate the demand during these high volume events. These sub-problems will address the following issues:

	Using the analytical tools of the Highway Capacity Manual, what would be the level of service at the intersection of U.S. 95/Styner-Lauder Avenue during the high traffic volumes experienced during University of Idaho football games if the intersection were signalized?
	Using a microscopic simulation model, what would be the level of service at the intersection of the U.S. 95/Styner-Lauder Avenue during the high traffic volumes experienced during University of Idaho football games if the intersection were signalized?
	Using the critical movement analysis technique, what would be our answer to the question of whether there is sufficient capacity at the intersection of the U.S. 95/Styner-Lauder Avenue during the high traffic volumes described above if the intersection were signalized?

Take a few minutes to think about each of these questions before proceeding. Click on continue when you are ready.

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