Laserfiche WebLink
I <br /> niv <br /> Draft Memorandum Perteet <br /> 2707 Colby Avenue,Suite 900,Everett,WA 98201 I P 425.252.7700 I F 425.339.6018 <br /> Table 1 — Intersection Level of Service for Traffic Signals <br /> LOS Average Control Delay <br /> I A (seconds/vehicle) <br /> 0-10 <br /> B > 10-20 <br /> C > 20-35 <br /> D > 35-55 <br /> E > 55-80 <br /> ' F > 80 <br /> The traffic model for this study was drawn over an aerial map of the area to capture roadway curvature, <br /> intersection spacing,lane configurations,and turn-lane storage lengths.Signal timing information was provided <br /> by the City of Everett. <br /> Each intersection was assessed at three analysis years (existing, 2015;year of opening, 2018;and horizon year, <br /> 2038), two times of day(AM peak hour,7:00a to 8:OOa; PM peak hour, 4:OOp to 5:OOp),and two development <br /> options(build and no-build). Existing AM and PM peak hour turning movement counts that were used in the <br /> analysis are shown in Figures 4 and 5.The AM counts were scaled by the ratio of new volumes to old volumes to <br /> develop 2015 data for each time period.The City of Everett uses a standard 1%annual growth rate to forecast <br /> future volumes. This growth rate was applied to each intersection to achieve volumes for the 2018 and 2038 <br /> analysis years. <br /> ' The build model differs from the no-build model in the following ways: <br /> • The build model studies the additional intersection of 75th Street SW at the Transit Center driveway <br /> with phasing as shown in Figure 9 and Synchro-optimized signal timings;and <br /> • The build model includes increased transit volumes based on projections from Community Transit(see <br /> below);and <br /> • The build model projects an increased number of pedestrians using crosswalks at the study intersections <br /> in order to reach the Transit Center;and <br /> • The build model assumes that 100 trips during each peak hour will switch from single-occupant vehicle <br /> (SOV)to transit,but also that the reduced demand on the system will cause 50 other trips to switch to <br /> SOV,resulting in a net change of 50 fewer SOV during each peak hour;and <br /> • The 50 trip reduction will affect turning movements as shown in Figure 11. <br /> I <br /> I <br /> I <br /> I <br /> Page 12 <br /> File location:X:\Community Transit\Projects\201 10155-Community Transit On-Call\.016-Seaway Transit Center Preliminary Engineering\Traffic\Submittals\02- <br /> Revision based on Katherine Casseday Comments\Seaway Transit Center -DRAFT Traffic Memorandum.docx <br />