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Study Methods and Assumptions Refresher Conditions and years Study area Future forecasts and projects Performance measures DRAFT.ANALYSIS FOR RE"' -
Conditions and Study Years - -- - - I -_(;>nditiol].s! I - Vear. I Existing - l!jltimate N.o Ba..ild I Construction: - - I.. 216 x 22 x x 235 x x Existing & No-Build Conditions Ultimate Condition (235) - Assumes both 1-9 Two-Way Transit and HOV and East Link projects are built and operating - Option 1: Ml vehicles able to use HOV lanes and ICW - Option 2: Ml vehicles restricted from HOV lanes and ICW
Conditions and Study Years East Link Construction - Mid-point of construction (22) - 1-9 Two-Way Transit and HOV Project completed - Operational Scenarios: Ml SOV eligible to use the HOV lanes and ICW Ml SOV restricted from the HOV lanes and ICW HOV lane converted to a general-purpose lane DEAFT ANALYSIS FOR 1 RE\l
1-9 Freeway Study Area i r tea.,.. - - 1-9 Study Area Boundary '"",_ ' I \ r o:.. \ \!,,. ::. -. 1-9 between western terminus and 1-45 Analyzed both AM and PM peak periods DRAFT ANALYSIS FOR RE\l
Iii' SE 27th St.,.,..., co g. g. Mercer Island Study Area 1-9lJ.lll l(si r2'.!l Q 1iE'211!1:ll. l \ '! co -:r.rj.e't",<p... 4'. l tnl-,. :r I<! SE t - ".. ): '..._.,... "' I -1-'. - - 17or.. ' MC :>IL VARA ' w.,. $l'.27msr if '",.... i. ;; I Jc: 11'1 IC; DETAIL.:m1 st:?all\!. ";# r i:: l:l J r IC! :ff"!f.. a- ' f i.. Oi la a II\ I<! "'""- - se'%<41l CJ...,.i. ;... I r;: ' l.l.llnt. IJurtJanlc',...,,. _. ' lb - BEAUMONT Sf.Vin Q."":A ii 11 / ti! i ll.,,,, I,.,.,. I Q.Q :r... J'. tt H... a: I? i i 1.. f e ix I - JR,.; a st'6:r>si; i.\\.. r U3'11hQ" a.. -t' ' i... > '. ' \, I ll1 \ -., 9 R, - r:i 71t'I St ' "' 1:.. I $.i DRAFT ANAlYSIS FOR EEVIE
Future Forecasts and Projects PSRC model - Forecasts for 22 and 235 - Utilize PSRC adopted Land Use Targets forecast Sound Transit model - Bus and light rail ridership forecasts Reasonably foreseeable projects: - Includes Connecting Washington projects - 1-9 Two-Way Transit is completed immediately prior to East Link construction - ST 2 program is complete by 235 - ST 3 is not assumed
Freeway Performance Measures 1-9 freeway measures: - Vehicle and transit demand forecasts - 1-9 congestion diagrams/level of service - Travel times - Vehicle and person throughput VISSIM and Synchro used for analysis results DRAFT ANALYSIS FOR REV.
Existing Results and Calibration Based on 216 data Synchro and VISSIM - Intersection LOS and queues - 1-9 travel times, throughput and congestion diagrams 1-9 Freeway Calibration - FHWA Simulation Guidelines and WSDOT VISSIM Protocols Volumes, Travel Times, Congestion Maps Met both FHWA and WSDOT guidelines and congestion reflects field conditions
Draft 235 Analysis Results Mercer Island 1-9 travel patterns 1-9 congestion maps 1-9 travel times to/from Mercer Island 1-9 vehicle and person throughput
AM Peak Period Travel Patterns To/From Mercer Island Mercer Island to Seattle Etside to Mercer Island - - 3% 29%,,.i e to Island '\. Total Trips To/From Mercer Island Mercer Island to Eastside To Ml 6,5 7,2 From Ml 7,7 8,7 Peak period 6:3AM lo 1 O:OOAM ID RAFT ANAL YS'IS F.OR REVI
PM Peak Period Travel Patterns To/From Mercer Island Mercer Island to Seattle Qi Eside to Mercer Island LEU..Jti& c:a Pl - ""'.t v». -E,,.I... r I'll, "' i Total Trips To/From Mercer Island - Mercer Island to Eastside,, To Ml 8,9 1,6 From Ml 7,6 9, Peak period = 3:3PM to 7:PM DRAFT ANAl!. V.S IS ifgr lrlevi
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Ultimate 2: 1-9 Eastbound Congestion Congestion forms between 1-5 and the Mt. Baker tunnel Consider modifying the transition location of the eastbound HOV lane to begin east of Mt. Baker tunnel
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1-9 Travel Times Developed to/from Mercer Island - Includes all on- and off-ramps on Mercer Island - Western 1-9 endpoint is at 4th Avenue (Seattle) - Eastern 1-9 endpoint is at 1-45 (Bellevue) Developing for SOV, HOV and Transit Data shown is only travel time on 1-9 - does not include travel time on Mercer Island streets.. \ \. ',,,...,. '\... '" " lj ' \ I. \ ii l.. \ t
235 AM Peak Period SOV Travel Times: To Mercer Island., From Bellevue (1-45) - To East Mercer Way and Island Crest Way From Seattle (4 1 h Avenue) - To West Mercer Way, 77th Avenue SE, Island Crest Way arid East Mercer Way XIX Ultimate 2 I Ultimate 2 Modified "Ultimate 2 Modified adjusts the beginning of the eastbound HOV lane to east of the Mouftl Baker,T1 DRAFF ANALYSIS F.OF.l REVl
235 AM Peak Period SOV Travel Times: From Mercer Island v.t... <t?' " :ii- s- = ii '41 4 \ "-t, To Bellevue ( 1-45) i Id - From East Mercer Way and Island Crest Way To Seattle (4th Avenue) - From West Mercer Way,?6th Avenue SE, Island Crest Way and East Mercer Way No-Build includes 77th Ave and Island Crest W DRAfrT ANALYSIS,FQH.fREVIE
235 PM Peak Period SOV Travel Times: To Mercer Island H From Bellevue (1-45) - To E. Mercer Way and Island Crest Way From Seattle (4th Avenue) - To W. Mercer Way, 77th Avenue SE, Island Crest Way and E. Mercer Way - No-Build includes 77th Ave and Island Crest Way via centelr XIX.. Ultlmale 2 I Ultimate 2 Modified l>ultlmate 2 ModlHed adjusts lhe beginning of the eastbound HOV lane to east of.the Moun! DMFT ANALYSIS ffof.t REV
235 PM Peak Period SOV Travel Times: From Mercer Island r'!!l Ml%11i!M m11.f!1, - 7. 6. 1.. - 'P:Jll_fllt=... MT (Q : ; fj 1 ' '1 ' M To Bellevue ( 1-45) 13 - From East Mercer Way and Island Crest Way To Seattle (4th Avenue) - From West Mercer Way, 76th Avenue SE, Island Crest Way an f East Mercer Way DRAF;r ANALYSIS.FOAi RE\llE
235 AM Peak Period Vehicle and Person Throughput w Mercf!l tstond " Vehicle 41,1 43,1 42,2 Vehicle 43,9 45,8 45,1 Person 65,9 77,6 n,2 Person 67,8 79,7 79,2 A from NB - 18% 17% A from NB - 18% 17 /o 'Results for Ulllmale 2 Modified *Vehicle and person throughputs include all modes (SOV, HOV, transit, elc.) DRAFT ANALYSIS FOR REVI
235 PM Peak Period Vehicle and Person Throughput Q1 ij:j Floating Bridge i...,. Men::er bland " Vehlcle 41,5 46, 44,3 Vehicle 43,7 5,7 4a,.5 Person 65,9 81,4 8,7 Person 65,4 85,8 84,5 fl from NB 24% 22% fl from NB 31% 29% Results for Ultimate 2 Modified vehicle and person throughputs Include all modes (SOV, HOV, transit, elc.) DRAFT ANALYSIS.F.OH REV.JE