1815 13TH ST SEPA 016 - 013 - PRMC NEW CLINIC BUILDING Traffic Report 2025-04-22

Transportation Impact Analysis Providence Regional Medical Center New Medical Clinic Building and Parking Lot Reconfiguration April 2016 increase in parking since this would serve existing employees and visitors already travel to and from the Campus. Trip Distribution and Assignment Trip distribution patterns for the proposed project were derived from the existing travel patterns in the area. The resulting distribution patterns are shown in Figure 6. Project trips associated with the clinic were assigned to the roadway network from the proposed driveway. In addition, the additional trips were assigned to the driveway to account for the proposal to increase parking spaces in the Campus lot. The project traffic volumes at the study intersections and the additional trips at the driveway are also displayed on Figure 6. Future With-Project Traffic Volumes Site-generated weekday PM peak hour traffic volumes were added to the future without- project traffic volumes at the study intersections to form the basis of the with-project analysis. Figure 7 shows the future with-project weekday PM peak hour traffic volumes. Table 5 summarizes anticipated project traffic impact at the study intersections. Table 5. Weekday PM Peak Hour Project Traffic Volumes Impacts 2022 Total Entering Volumes Percent Study Intersections Without-Project With-Project Project Traffic' Project Impact2 1.Broadway/13th St 2,452 2,559 107 4% 2.Broadway/14th St 2,441 2,501 60 2% 3.Broadway/16th St 2,464 2,524 60 2% 4.Broadway/19th St 2,625 2,685 60 2% 5.Site Access/13th St 595 721 126 17%3 1. Total project traffic projected at the study intersection. 2. Represents the proportion of project traffic at the study intersections under the future 2022 with-project conditions. 3. Proportional increase represents both the clinic trips and trips associated with the additional parking spaces. Table 5 shows that the proposed project would increase traffic volumes at the off-site study intersections by 4 percent or less during the weekday PM peak hour. This is within the range of daily traffic fluctuations. The site access would have the highest traffic volume impacts with a projected volume increase of 17 percent during the weekday PM peak hour. This higher percent increase is due to the concentration of project trips at the access and overall lower traffic volumes at this intersection. Future With-Project Traffic Operations Weekday PM peak hour future 2022 with-project study intersection operations were evaluated. Intersection LOS was calculated using the method and assumptions described for the without-project conditions. Potential traffic operation impacts of the proposed project are identified by comparing without-and with-project conditions. Table 6 summarizes the 2022 intersection operations. LOS worksheets are included in Appendix C. r 13