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 traffic counts. Existing weekday PM peak hour traffic volumes are summarized on Figure 4 and were used to establish existing traffic conditions. Future 2022 without-project weekday PM peak hour traffic forecasts at the off-site study intersections were provided by the City of Everett. These forecasts were estimated by applying a growth rate of approximately 1 percent per year to existing intersection turning movements. This growth rate was also applied to the through movements at the 13th Street site access intersection to determine future 2022 without-project traffic volumes'. Figure 5 illustrates future 2022 without-project weekday PM peak hour traffic volumes at the study intersections. Traffic Operations Weekday PM peak hour intersection operations were evaluated based on the procedures identified in the Highway Capacity Manual(2010) using Synchro version 9.0. Traffic operations for an intersection can be described alphabetically with a range of levels of service (LOS A through F), with LOS A indicating free-flowing traffic and LOS F indicating extreme congestion and long vehicle delays. Signalized intersection LOS is based on average delay per vehicle for the whole intersection. At side-street stop-controlled intersections LOS is measured in average delay per vehicle and is reported for the worst operating approach of the intersection. Appendix B provides a more detailed explanation of intersection LOS criteria. As noted previously, the future 2022 analysis incorporates signal timing changes at the study intersections. Table 1 summarizes the existing and future study intersection traffic operations. Detailed LOS worksheets are provided in Appendix C. Table 1.Existing and Future Without-Project Weekday PM Peak Hour Level of Service Summary 2016 Existing 2022 Without-Project Intersections Traffic Control LOS1 Delay' WM' LOS Delay WM 1.Broadway/13th St Signal A 5 A 8 2.Broadway/14th St Signal A 4 B 10 3.Broadway/16th St Signal A 6 A 8 4.Broadway/19th St Signal B 19 C 23 5.Site Access/13th St Two-Way Stop-Control D 26 SB D 27 SB 1. Level of service(LOS),based on 2010 Highway Capacity Manual methodology. 2. Average delay in seconds per vehicle. 3. Worst movement reported for unsignalized intersections where SB=southbound. The City has established a LOS D standard for intersections. This standard is applied to the off-site study intersections and not to the stop controlled movements at the existing 13th Street site access point. As shown in Table 1, all of the study intersections operate at LOS D or better during the weekday PM peak hour under existing conditions. Compared to existing conditions, growth in the study area would result in small increases in delay for future conditions and all study intersections would operate at LOS D or better. 1 At the site access only the through movements along 13th Street were grown for the future forecasts because the movements to and from the site access driveways are associated with the Campus.Traffic increases anticipated over the next 6-years for the Providence Regional Medical Center(PRMC)would be related to the proposed project and are captured in the evaluation of future with-project conditions.If additional projects were to occur within 6-years, PRMC would be required to conduct a site specific transportation impact analysis. 7