Problem 2: U.S. 95 Arterial

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The problem statement remains nearly the same as in Problem 1: should the intersection of U.S. 95/Styner-Lauder Avenue be signalized or left to operate as a TWSC intersection?

But we will now consider the operation of the intersection as part of the U.S. 95 arterial system. With this context in mind, we will complete three computations, using the HCM, to get a better picture of the operation of the intersection under both TWSC and signal control considering the effects of the adjacent intersections of Sweet Avenue and Palouse River Drive. We will also consider a fourth sub-problem in which we look at some of the issues involved in signal coordination.

In this problem, you will consider the following issues as you work through the computations for the three sub-problems:

This problem illustrates some of the important elements of performing an analysis of a signalized intersection operating in the vicinity of nearby intersections by addressing the following issues as they relate to the proposed signal at the U.S. 95/Styner-Lauder Avenue intersection:

Sub-problem 2a: Effect of upstream signals on TWSC intersection capacity
Sub-problem 2b: Arrival type at signalized intersections
Sub-problem 2c: Arterial (urban street) analysis
Sub-problem 2d: Signal progression and Time-space diagrams