Sub-problem 4b: Two-way Stop Controlled Analysis

Step 2. Results

The results of this analysis are presented in Exhibit 3-30. These results reaffirm the conclusions drawn from sub-problem 4a, specifically that TWSC is not a viable control alternative. The v/c ratio for the NBL movement is calculated to be 3.72, which means the demand volume is equivalent to 372% of the available capacity. The NBR movement v/c ratio, calculated to be 1.92, is also an obvious problem.

The WBL movement, on the other hand, appears to be operating within its capacity, with a v/c ratio of 0.71. This presents an interesting contrast with the NBL movement, since both movements have to contend with the same conflicting volume (i.e., 2,010 vph from the WBT). The difference may be seen in both the graphical representation of Exhibit 3-27 and the numerical discussion presented in sub-problem 4a.