7505 SEAWAY BLVD SEPA 016 - 034 - SEAWAY TRANSIT CENTER Traffic Report 2025-04-14

I Draft Memorandum Perteet 2707 Colby Avenue,Suite 900,Everett,WA 98201 I P 425.252.7700 I F 425.339.6018 Community Transit is in the process of developing route concepts and frequencies for the proposed Transit Center.As such,the available information regarding routes and schedules is preliminary and may change prior ' to the facility opening.The Seaway Transit Center is expected to serve routes for Community Transit(SWIFT II, 280), King County Metro(952),and Everett Transit(3,8, 12,70),as well as Boeing shuttles.Community Transit projects 25 combined trips through the Transit Center for these routes and shuttles in the year of opening. However, the only new trips that will be generated by the Seaway transit center are for SWIFT II and Boeing Shuttle;all other service is existing.These two new routes will account for 6 new stops each in the PM peak hour. Because each stop at the transit center consists of a start node and an end node,this development will generate 24 PM peak hour trips,which is below the 50 trip threshold. Due to the success of the existing SWIFT route,and the anticipated success of the proposed route that will run from the Seaway Transit Center,the development is projected to reduce the number of vehicle trips on the City of Everett traffic network.Though some additional trips will be generated by transit coaches and staff vehicles, those volumes will be offset by the number of drivers who will shift behavior and change from SOV to SWIFT. Per the Community Transit BRT Corridor Planning and Route Definition Study prepared for SWIFT II,the route would serve 3,300 daily riders if opened this year,and 4,000 riders per day by 2035.The riders will almost all be current road users that will switch from SOV or a different transit route to SWIFT. Assuming 240 new daily transit trip ends due to the Seaway Transit Center,even if only 7.5%of SWIFT II riders were previously SOV,the trip reductions would exceed the additional transit trips and traffic mitigation fees would not be required.The anticipated switch from SOV is expected to exceed 7.5%,therefore,the Seaway Transit Center is not expected to trigger any traffic mitigation fees. Local employers along the route will communicate information about the proposed SWIFT line due to Commute Trip Reduction (CTR) requirements.Over 1,000 sites and businesses in Washington State meet the CTR requirements,including Boeing and others along the proposed route. Traffic Analysis Though not required per City of Everett standards, a traffic analysis was conducted to test the signal configuration at the transit center and PUD driveways as well as confirm that operations at Seaway Boulevard and 75th Street SW would not be significantly impacted. Three performance metrics were tested for each study intersection:intersection volume to capacity ratio(v/c), average control delay per vehicle, and level of service (LOS). These values are computed using the Highway Capacity Manual(HCM),which outlines how to model intersection operations.The study intersections were modeled in Synchro 8,which is a software developed by Trafficware that applies the HCM methodology to user- defined geometry,volumes,and signal timing information. LOS ranges from A (least delay) to F (most delay). For signalized intersections, the performance metric is a function of the average delay for all vehicles that travel through the intersection. Table 1 summarizes level of service ranges for intersections controlled by traffic signals. i I Page I I File location:X:\Community Transit\Projects\201 10155-Community Transit On-Call\.016-Seaway Transit Center Preliminary Engineering\Traffic\Submittals\02- Revision based on Katherine Casseday Comments\Seaway Transit Center -DRAFT Traffic Memorandum.docx I