Sub-problem 2a: Analyzing the Effects of Pedestrians

Step 2: Results

To evaluate the effects of this signal timing strategy, we will use the Chapter 16 HCM operational methodology. Running the analysis for a 120-second cycle results in the queues, delays, and LOS values shown in Exhibit 5-24:

While pedestrians are accommodated more efficiently and more safely, the intersection performance is worsened under this scenario, at least with respect to the LOS criterion. On the southbound approach, LOS drops from C to E/F. Since pedestrians are restricted to crossing only the northbound and westbound approaches (with the northbound approach closed to vehicles), the need for an exclusive pedestrian phase is probably minimal, especially with the deterioration of the intersection efficiency using this design.