FIGURE 16B: SCHANTZ AVENUE AT PATTERSON ROAD WARRANT #3 (70% FACTOR)

Chart for Warrant 3 Peak Hour (70% Factor) showing Minor Street Higher Volume Approach vs Major Street Total of Both Approaches

Warrants #4 and #5. A total of 470 pedestrians were observed crossing Patterson Road at Schantz Avenue during the 8-hour data collection periods. This includes 135 pedestrians crossing Patterson Road between 3:00PM and 4:00PM which coincides with the school dismissal times. Of the135 pedestrians, is expected that at least half (i.e. 62 pedestrians) are students. Due to the intersection being located near the Oakwood Community Center and about 1/3rd of a mile from Oakwood Junior and Senior High School, a gap analysis was performed at the intersection to understand the impact of pedestrian crossings without the existing signal.

Gap analysis was performed using a Poisson Distribution methodology to determine if an acceptable number of gaps are available to cross Patterson Road at the AM, midday, and PM peak hours. Acceptable numbers of gaps to accommodate pedestrians are assumed to be one per minute (60 gaps per hour). The available number of gaps is dependent on total bidirectional volume on Patterson Road, crossing distance from curb ramp to curb ramp (measured at 30 ft), and walking speed (3.5 ft/s was assumed). The available gaps during peak hours were calculated using the following equation:

No. of Gaps = λ × e-(λt)
Where:
  • λ = Total bidirectional volume at Patterson Rd @ Shafor Blvd
  • t = Crossing Time = 30 ft 3.5 ft/s = 8.6 seconds

The resulting number of gaps for each peak hour volume are shown in Figure 16C.