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

I I Draft Memorandum [Z] Perteet 2707 Colby Avenue,Suite 900,Everett,WA 98201 I P 425.252.7700 I F 425.339.6018 I 75th Street SW and Transit Center Driveway 75th Street SW and PUD Driveway 1 01 02 03 04 1 f 01 02 03 f 04 OLA I OLB I OLB 0. 05 06 07 08 05 06 07 08 __ 4 OLA __ -- -- 4— -- I4 Vehicle Movement ► Pedestrian Movement 1--- Overlap Vehicle Movement IFigure 10—Tandem Signal Phasing Signal timing for the two intersections will be designed so that vehicles will be able to clear both intersections with a single phase. For example, as the eastbound through indication at the transit center driveway changes Ifrom green to amber, the indication at the PUD driveway will remain green for several additional seconds in order to allow all vehicles in between the two driveways to clear both intersections.Turning movements out of the driveways will be afforded similar treatment.Under Phase 3 as shown above in Figure 10,vehicles will be able I to turn both left and right out of the PUD driveway. As this happens, an overlap phase will be active for the intersection of 75th Street SW and the transit center driveway which will allow for westbound traffic to continue through the intersection under a green indication. IDetection for the two intersections is not restricted to any particular method. Because the PUD driveway entrance is not being modified,the existing stop bar loops for that approach can remain in place.There are no I existing loops for the 75th Street SW approaches.The proposed turn pocket into the transit center will only require stop bar detection. Detection can be used in between the two intersections to determine the proper amount of additional green indication that will allow vehicles to clear both intersections. ITraffic Mitigation The City of Everett requires that developers, both private and public, conform to traffic mitigation standards whenever improvements are proposed. In June 2014, modifications to the City of Everett's traffic mitigation requirements were approved and they took effect on January 1,2015(ordinance 3387-14). I The newly adopted standards mandate that developers prepare a traffic analysis in accordance with SEPA guidelines if more than 50 average PM peak hour trips are generated by the improvement. It is also possible for the City Traffic Engineer to require a traffic analysis be compiled even if the 50 trip threshold is not met. Additionally,a fee to mitigate traffic impacts is required for any site that generates 10 or more average daily trips. IGeneration information is to be determined based on the Institute of Transportation Engineers (ITE) Trip Generation Manual if the volumes are unknown. For this project,all bus volumes will be determined based on 1 headways as opposed to the Trip Generation Manual. Seaway Transit Center IThe transit center is not expected to generate 50 PM peak hour trips on a weekday.Therefore,a traffic analysis is not expected to be necessary for this project. I Page 10 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 1