PC-2023-05 - Laserfiche WebLink

Traffic and Circulation Considerations The number of new vehicle trips that would be generated by the three conceptual development scenarios were estimated using trip generation rates from the City's travel demand model. These rates are based on data from the Institute of Transportation Engineer's Trip Generation Manual. This manual is a national compilation of trip generation statistics for land-uses of various sizes and types. The analysis focuses on the PM peak hour of travel as traffic within the area, as well as project trip generation, peaks during the evening peak period when retail, employment, and residential commute traffic is highest. As noted, Scenarios 2 and 2a reflect introduction of some commercial uses at the mall, and the model analyzed the addition of about 300,000 square feet of office uses to analyze how such use(s) might affect traffic conditions. Table 2: Trip Generation Summary Scenario 1 2 2a In 531 531 PM Peak Hour Trip Generation Out 291 567 567 Total 765 1,098 1,098 As illustrated in Table 2, Scenarios 2 and 2a would generate approximately 50 percent more traffic than Scenario 1. This is to be expected, as Scenarios 2 and 2a include additional office space not included in Scenario 1. Using the City's travel demand model, the directions of approach and departure for vehicle trips generated by the individual development scenarios were determined. This information was used to distribute new inbound and outbound trips to the local street network. It should be noted that the "existing" traffic volumes used for the analysis are from pre-pandemic conditions, which are higher than current volumes and also reflect traffic levels that occurred when the Nordstrom store was operational at the mall. Prevailing evening peak hour traffic volumes are highest on the sections of Stoneridge Mall Road between Genomics Place and Stoneridge Drive and on Canyon Way between Stoneridge Mall Road and Foothill Road. The section of Stoneridge Mall Road between Genomics Place and Stoneridge Drive is a segment which experiences high levels of congestion and queuing during the PM peak hour in the southbound direction. Vehicles often wait through multiple signal cycles to pass through the Stoneridge Mall Road/Stoneridge Drive intersection. This condition has prompted some vehicles to avoid this route to the freeway, instead of driving the longer distance to Springdale to access Stoneridge Drive. Scenario 1 contributes approximately 80 trips to this congested area. Scenarios 2 and 2a would generate additional impacts on this section compared to Scenario 1. The Page 11 of 17