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 Project Impacts This section of the analysis documents project-generated impacts on the surrounding transportation system. If necessary, mitigation measures are identified to reduce or offset project impacts. Trip Generation The proposed projects are consistent with the assumed ECC Property uses included in the Master Plan. The following describes traffic generation associated with the proposed clinic and parking lot reconfiguration. Clinic Project traffic for the weekday daily and AM and PM peak hour conditions were estimated based on the Institute of Transportation Engineers (ITE) Trip Generation Manual, 9th Edition. Trip Generation is a nationally recognized and locally accepted method for determining trip generation for development projects. The Trip Generation Manual provides both clinic and medical-dental office land use categories. The description of these two categories is similar and both are consistent with the proposed project. Weekday daily, AM peak hour, and PM peak hour project trip generation was based on the land use size and Medical-Dental Office Building (#720) average or regression equation trip rates'. The medical-dental office land use was used rather than clinic because trip rates are based on a greater number of site surveys (i.e., 10 to 43 sites compared to 1 to 2 sites for the Clinic land use (#630) data) and average building size of the medical-dental office sites surveyed is consistent with the proposal (i.e., 30,000 to 45,000 square--feet for medical office sites compared to 60,000 to 112,000 square- feet). The estimated project trip generation is shown in Table 4. Table 4. Estimated Weekday 37,000 sf Medical Office Trip Generation Project Trips Time Period Rate' In Out Total Daily 35.08 649 649 1,298 AM peak Hour 2.39 70 18 88 PM Peak Hour 3.22 33 86 119 Note:sf=square-feet 1. Trips rates from ITE Trip Generation Manual,9'h Edition. As shown in the table, the proposed clinic would generate approximately 1,300 new daily trips. During the weekday AM peak hour, the clinic would generate approximately 88 trips (70 inbound and 18 outbound). During the weekday PM peak hour, the clinic would generate approximately 119 trips (33 inbound and 86 outbound). Parking Lot Reconfiguratio As discussed previously, existing CUP and parking would remain on the southern portion of the site. The parking would be reconfigured to provide an additional 31 parking spaces for a total of 347 spaces. No new traffic associated with additional parking is anticipated since it will accommodate existing site users that may be parking elsewhere on-campus or along adjacent streets. The existing driveway traffic was increased by 10 percent to account for the potential increase in trips to and from the driveway associated with more parking spaces in this lot. It is not anticipated that the off-site study intersections would be impacted by the 2 Procedures outlines in the ITE Trip Generation Handbook,3'd Edition were followed to determine if the average or regression equation trip rates were used to estimate trip generation. 12