Sub-problem 6a: Planning Analysis at Palouse River Drive

The twenty-year projected volumes for this intersection, adjusted for the peak hour factor are shown in Exhibit 1-48. These projections can be obtained by applying a 2.0 percent growth rate, compounded annually, to the existing peak-hour traffic volumes.

Each of the steps in the quick estimation method will be presented in detail in this sub-problem. The method involves a series of five detailed worksheets on which the data are entered and computations are performed.

The quick estimation steps are as follows (click on each step to see a more detailed discussion):

1. Determination of left-turn treatments

2. Determination of lane volumes

3. Phasing plan synthesis

4. Cycle Length determination

5. Determination of intersection status

6. Phase time determination

7. Performance estimation

For purposes of this discussion, the detailed computations are skipped and the results are summarized in Exhibit 1-49: