DRAFT
DRAFT
DRAFTNBNBSBSB
StreetcarStreetcarTravelLaneTravelLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
NB
BikeLane
Parking&
Loading
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
NB
Light-Rail
SB
Light-Rail
NB
TravelLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
NBSB
TravelLane
SB
TravelLaneTravelLane
NB
TravelLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
NB
BikeLane
Parking&
Loading
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
NB
Light-Rail
/Bus
SB
Light-Rail
/Bus
NB
TravelLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
NB=Northbound
SB=Southbound
Existing
1stAve2ndAve3rdAveDowntownSeattle
TransitTunnel4thAve5thAve6thAve
DRAFT
DRAFT
*TypicalcrosssectionsbetweenSpringStandMadisonStlookingnorth.Curbparking/loadingnotshownexceptwheresubjecttochange.
OptionAConcept WhatisChanging?
•CenterCityConnector
Streetcar
•Onelaneeachdirection
repurposedfortransitlane
•Sameastoday•DowntownSeattleTransit
Tunnelbusroutesoperate
southboundon2ndAve
•Existing2-Wayprotectedbike
laneisextendednorthto
DennyandsouthtoJackson
(currentSDOTproject)
•Trafficvolumesincrease
10-15%duetotemporary
AlaskanWayclosureandlane
repurposingon1stAve
•Sameastoday
•Bustripsarelongerandlessreliablefortransitcustomerson2nd,4th,and5thAvenues
•Transitagenciespaymoretomaintaincurrentservicelevels
•SeveralkeybusstopsareovercrowdedduringthePMpeak,affectingpedestrianmovements
•LightrailreliabilityimprovesinDowntownSeattleTransitTunnel
•DrivershavelongerpeaktripsduetotrafficshiftingfromAlaskanWayand1stAvenueandincreasedbusvolumes
•Challengingtoimplementnorthboundandsouthboundprotectedbikelaneeastof3rdAve
KEYTAKEAWAYS:
OPTIONA:
BASELINEOR“DONOTHING”(2019)
•DowntownSeattleTransitTunnel
busroutesoperatenorthbound
on4thAve
•Trafficvolumesincrease10-15%
duetotemporaryAlaskanWay
closureandlanerepurposingon
1stAve
•Lightrailonly
•Lightrailheadway
sameastoday
•Sameastoday
DRAFT
DRAFT
DRAFT
NBSB
TravelLane
SB
TravelLaneTravelLane
NB
TravelLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
NB
BikeLane
Parking&
Loading
NB
Light-Rail
/Bus
SB
Light-Rail
/Bus
NB
TravelLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
NBNBSBSB
StreetcarStreetcarTravelLaneTravelLane
SB
Protected
BikeLane
SB
TravelLane
SB
TravelLane
SB
Protected
BikeLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
Protected/
permissiveright-turnphasing
NB
Protected
BikeLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
Protected/
permissiveright-turnphasing
NB
TravelLane
NB
TravelLane
NB
TravelLane
NB
Light-Rail
SB
Light-Rail
Withsidewalkreduction
Withlanereduction
NB=Northbound
SB=Southbound
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
Existing
1stAve2ndAve3rdAveDowntownSeattle
TransitTunnel4thAve5thAve6thAve
DRAFT
DRAFT
*TypicalcrosssectionsbetweenSpringStandMadisonStlookingnorth.Curbparking/loadingnotshownexceptwheresubjecttochange.
OptionBConcept WhatisChanging?
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
•SameasBaseline•Opportunitiestospeed
boardingatbusstopsare
pursued
•Allowssomebusesto
relocatefrom2nd&4th
Aves
•Improvementsto
passengerenvironment&
organizationatcrowded
busstops
•Intersectionimprovementsat
westboundcrossstreets(i.e.,
Madison&Columbia)
•Signalphasingthatallows
transitlanetoclearofright
turningvehicles
•Southboundprotected
bikelanewouldrequire
repurposingatravel
laneormovingcurbs
andpossiblyremoving
trees
•Reductiontotwotravel
laneswouldrequire
additionalinvestmentin
two-way6thAve
•Intersectionimprovementsat
eastboundcrossstreets(i.e.,
Cherry,Marion,Spring,Pike)
•Signalphasingthatallowstransit
lanetoclearofrightturning
vehicles
•Northboundprotectedbikelane
(assumepairedwithsouthbound
laneon5thAve)
•SameasBaseline•SameasBaseline
OPTIONB:
OPERATIONALENHANCEMENTSON2ND,3RD,4TH,&5THAVENUES(2019)
•Modestoperationalimprovementsfortransiton2ndand4thAvenues,butpotentialimprovementstospeedboardingallow
someregionalroutestorelocateto3rdAvenue
•Opportunitytoimplement4thand5thAvenueprotectedbikelanecouplet
•LowcapitalinvestmentallowseasierimplementationbeforeFall2018
KEYTAKEAWAYS:
DRAFT
DRAFT
DRAFT
NBSB
TravelLane
SB
TravelLaneTravelLane
NB
TravelLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
NB
BikeLane
Parking&
Loading
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
NB
Light-Rail
/Bus
SB
Light-Rail
/Bus
NB
TravelLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
NBNBSBSB
StreetcarStreetcarTravelLaneTravelLane
NB
TransitOnlyLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
Protected/
permissiveright-turnphasing
NB
TravelLane
NB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
5
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
Protected/
permissiveright-turnphasing
SpringtoUniversity
NB
Light-Rail
SB
Light-Rail
ToSBI-5NB=Northbound
SB=Southbound
Existing
1stAve2ndAve3rdAveDowntownSeattle
TransitTunnel4thAve5thAve6thAve
DRAFT
DRAFT
*TypicalcrosssectionsbetweenSpringStandMadisonStlookingnorth.Curbparking/loadingnotshownexceptwheresubjecttochange.
OptionCConcept WhatisChanging?
•SameasBaseline•SameasBaseline•Intersectionimprovementsat
westboundcrossstreets(i.e.,
Madison,Columbia)
•Signalphasingthatallows
transitlanetoclearofright
turningvehicles
•Onelanerepurposed
tocreatesouthbound
transitlane
•Morebusservicemoved
to5thAvenuetotake
advantageoftransit
lane
•Onetravellanesnorth
ofMadison,threesouth
ofMadison
•Doesnotallowroomfor
bikelane
•Secondnorthboundtransitlane
added
•Dualtransitlaneaddscapacity
forbuses
•Currentskipstoppattern
retained
•Signalphasingthatallowstransit
lanetoclearofrightturning
vehicles
•Doesnotallowroomforbikelane
•SameasBaseline•Convertedtotwo-way
streetbetweenStewart
andMarion
•Southboundtravellane
providesadditional
capacityforI-5access
fromNorthDowntown,
DennyTriangle,Belltown,
andSouthLakeUnion
•5thAvetransitlaneis
dependentontwo-way
6thAve
OPTIONC:
4TH&5THAVENUETRANSITCOUPLET(2019)
•Addsonefulllaneoftransitcapacitynorthboundandsouthbound
•Repurposinglanefortransiton5thAvenuenecessitatesnewsouthboundlaneon6thAvenue;importantforaccesstoI-5South
•Verydifficulttoimplementnorthboundorsouthboundprotectedbikelaneeastof3rdAvenue
•Sidewalkcrowdingisanissueon2nd,4th,and5thAvenues
•Buspassengersmayhavetowalkfurtheruphill/downhilltoaccesstransit
•Hasthemostsignificantreductioninon-streetparkingandloadingduringthepeakperiod
•Moreintensivecapitalprojectssuchastwo-way6thAvenuewillrequireexpeditedprocesstoimplementbyFall2018
KEYTAKEAWAYS:
DRAFT
DRAFT
DRAFT
NBSB
TravelLane
SB
TravelLaneTravelLane
NB
TravelLane
NB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
NB
BikeLane
Parking&
Loading
NB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
NB
Light-Rail
/Bus
SB
Light-Rail
/Bus
NB
TravelLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TravelLane
SB
TransitOnlyLane
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
Parking/Loading
&Left-Turn
NBNBSBSB
StreetcarStreetcarTravelLaneTravelLane
NB
TravelLane
NB
TravelLane
NB
TravelLane
2-way
Protected
BikeLane
PeakGP/
Off-PeakParking
NB
Parking/Loading
&Left-Turn
SB
TravelLane
SB
TravelLane
2-way
Protected
BikeLane
PeakGP/
Off-PeakParking
SBNB
TransitOnlyLane
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
NB
TravelLane
NB
TravelLane
SB
TravelLane
5
SpringtoUniversity
Note:CenterlanealternatesbetweenNBandSB
toallowbusestopassatstops.
NB
TransitOnlyLane
SB
TransitOnlyLane
SB
TransitOnlyLaneBusStop
NB
Light-Rail
SB
Light-Rail
NB=Northbound
SB=Southbound
Existing
1stAve2ndAve3rdAveDowntownSeattle
TransitTunnel4thAve5thAve6thAve
DRAFT
DRAFT
*TypicalcrosssectionsbetweenSpringStandMadisonStlookingnorth.Curbparking/loadingnotshownexceptwheresubjecttochange.
OptionDConcept WhatisChanging?
•SameasBaseline•SameasBaseline•Southboundtransitlane
removed
•Westcurblaneusedfor
generaltrafficduringpeak
andparking/loadingduring
offpeak
•Mosttransitservicerelocated
to5thAve
•Transitonlyduringpeak
periodsfromStewartto
Jackson
•Operatessimilarto3rd
AveTransitSpine;transit
onlyatpeakswithlimited
accessanddelivery
•Mostbusservices
using2nd&4thAves
consolidateto5thAve
•Signficantlyalters
theexisting5thAve
streetscapeandtreeline
•Northboundtransitlaneremoved
•Eastcurblaneusedforgeneral
trafficduringpeakandparking/
loadingduringoffpeak
•Mosttransitservicerelocatedto
5thAve
•SameasBaseline•Convertedtotwo-way
streetbetweenStewart
andMarion
•Southboundtravellane
providesadditional
capacityforI-5access
fromNorthDowntown,
DennyTriangle,Belltown,
andSouthLakeUnion
•5thAvepeaktransitonly
operationisdependent
ontwo-way6thAve
OPTIOND:
5THAVENUETWO-WAYTRANSITSPINE(2019)
•Concentratestransitserviceon1st,3rd,and5thAvenues
•Duringpeak,mostsurfacetransitisoperatinginatransit-onlylane
•Simplifiesstreetoperationasthereareverylimitedturnmovementsfrom5thAvenueduringpeakperiods
•Simplifiedtrafficoperationsreducedriverdelay,butwouldchangeaccesstosomebuildings&garages
•Buspassengersmayhavetowalkfurtheruphill/downhilltoaccesstransit
•Introducingnewbusstopson5thAvenuewouldrequireimpactstreetscapeandrequiresometreeremoval
•5thand6thAvenueprojectelementsarecapitalintensive;design/outreachwouldmakeFall2018completionchallenging
KEYTAKEAWAYS:
DRAFT
WB
BikeLane
Parking&
Loading
WB
GPLane
EB
GPLane
EB
BikeLane
Parking&
Loading
WB
GPLane
Center
TurnLane
EB
GPLane
Parking&
Loading
Parking&
Loading
EB
TransitOnlyLane
EB
GPLane
EB
GPLane
Parking&
Loading
Parking/Loading
&Right-Turn
WB
TransitOnlyLane
WB
GPLane
WB
GPLane
WB
GPLane
WB
GPLane
Parking/Loading
&Right-Turn
Parking/Loading
&Left-Turn
WB
GPLane
WB
GPLane
WB
GPLane
Parking/Loading
&Right-Turn
Parking/Loading
&Left-Turn
WB
GPLane
Southcurbhasparking/loadingwestof5thAveOnly3travellaneswestof4thAve
Only3travellaneswestof4thAve
WB
BikeLane
Parking&
Loading
WB
GPLane
EB
GPLane
EB
BikeLane
Parking&
Loading
WB
GPLane
Center
TurnLane
EB
GPLane
Parking&
Loading
Parking&
Loading
EB
TransitOnlyLane
EB
GPLane
EB
GPLane
Parking&
Loading
Parking/Loading
&Right-Turn
WB
TransitOnlyLane
WB
GPLane
WB
GPLane
Southcurbhasparking/loadingwestof5thAve
EB=Eastbound
WB=Westbound
OptionAConceptExisting
PineStPikeStUnionStPineStPikeSt
1stAvenueto8thAvenue8thAvenuetoBroadway
DRAFT
*TypicalcrosssectionsbetweenBelmontAveandBoylstonAvelookingeast.*Typicalcrosssectionsbetween5thAveand6thAvelookingeast.
WhatisChanging?
•Nochangeinconfigurationofstreets
•Smallincreaseintrafficvolumesfromtodayduetogrowth
•MaybeconstructionimpactstoPikeand/orPinefromWashingtonStateConventionCenterExpansion
•Nochangeinconfigurationofstreets
•Smallincreaseintrafficvolumesfromtodayduetogrowth
OPTIONA:
BASELINEOR“DONOTHING”(2019)
•Operationsandstreetexperiencesimilartotoday
•Slightincreasesindelayfortransitpassengersanddriversduetogrowth
•AnalysisdoesnotaccountforWashingtonStateConventionCenterconstructionimpacts
KEYTAKEAWAYS:
DRAFT
WB
BikeLane
Parking&
Loading
WB
TravelLane
EB
TravelLane
EB
BikeLane
Parking&
Loading
WB
TravelLane
Center
TurnLane
EB
TravelLane
Parking&
Loading
Parking&
Loading
Parking&
Loading
WB
TravelLane
EB
TravelLane
Parking&
Loading
WB
TransitOnlyLane
WB
TravelLane
WB
Protected
BikeLane
WB
TravelLane
EB
TravelLane
EB
Protected
BikeLane
WB
Protected
BikeLane
EB
TransitOnlyLane
EB
TravelLane
EB
TravelLane
Parking&
Loading
Parking/Loading
&Right-Turn
WB
TransitOnlyLane
WB
TravelLane
WB
TravelLane
WB
TravelLane
WB
TravelLane
Parking/Loading
&Right-Turn
Parking/Loading
&Left-Turn
WB
TravelLane
WB
TravelLane
WB
TravelLane
Parking/Loading
&Right-Turn
Parking/Loading
&Left-Turn
WB
TravelLane
Southcurbhasparking/loadingwestof5thAveOnly3travellaneswestof4thAve
Only3travellaneswestof4thAve
Parking/Loading
&Right-Turn
Center
TurnLane
EB
TransitOnlyLane
EB
TravelLane
EB
Protected
BikeLane
CurbBulb/
Sidewalk
BusStop/
CurbBulb
EB=Eastbound
WB=Westbound
OptionBConceptExisting
PineStPikeStUnionStPineStPikeSt
WhatisChanging?
1stAvenueto8thAvenue8thAvenuetoBroadway
DRAFT
DRAFT
*TypicalcrosssectionsbetweenBelmontAveandBoylstonAvelookingeast.*Typicalcrosssectionsbetween5thAveand6thAvelookingeast.
•Westboundtravellane
repurposedforsingle-direction
protectedbikelane
•Route41operateswestbound
fromI-5to1stAve
•NewRoute41-onlybusstop
between4thand3rdAves
•Eastboundtravellane
repurposedforsingle-direction
protectedbikelane
•Improvementstoexisting
busstopsat4thand6thAves
toaccommodateRoute41
passengers
•Single-directionprotectedbike
laneoneachcurb
•On-streetparkingandloading
retainedonsouthsideofstreet
adjacenttoprotectedbikelane
•Centerturnlaneeliminated
eastofBorenAveand
oneeastboundtrafficlane
eliminatedbetweenBorenAve
and8thAve
•Existingbikelanesremoved
•Centerturnlaneadded
OPTIONB:DOWNTOWNCOUPLETWITHPIKESTREET
PROTECTEDBIKELANEPAIREASTOF8THAVENUE
•Changeshaveminimaleffectontransitspeedorreliabilitydowntown
•TrafficmodelingshowssignificantcongestioneastboundonPikeStreetduringPMpeakperiod
•Route41wouldrequireimprovedandnewbusstopsandpotentialboardingimprovementstoavoidsidewalkcrowding
•Thisoptionhasmostsignificantlossofcurbparkingandloading
KEYTAKEAWAYS:
DRAFT
WB
BikeLane
Parking&
Loading
WB
TravelLane
EB
TravelLane
EB
BikeLane
Parking&
Loading
WB
TravelLane
Center
TurnLane
EB
TravelLane
Parking&
Loading
Parking&
Loading
EB
TransitOnlyLane
EB
TravelLane
EB
TravelLane
Parking&
Loading
Parking/Loading
&Right-Turn
WB
TransitOnlyLane
WB
TravelLane
WB
Protected
BikeLane
WB
TransitOnlyLane
WB
TravelLane
WB
TravelLane
WB
TravelLane
WB
TravelLane
Parking/Loading
&Right-Turn
Parking/Loading
&Left-Turn
WB
TravelLane
WB
TravelLane
WB
TravelLane
Parking/Loading
&Right-Turn
Parking/Loading
&Left-Turn
WB
TravelLane
Southcurbhasparking/loadingwestof5thAveOnly3travellaneswestof4thAve
Only3travellaneswestof4thAve
EB
TransitOnlyLane
EB
TravelLane
EB
Protected
BikeLane
CurbBulb/
Sidewalk
BusStop/
CurbBulb
EB
TravelLane
Parking&
Loading
EB
TransitOnly
Lane
EB
TravelLane
EB
Protected
BikeLane
Parking&
Loading
WB
Protected
BikeLane
WB
TravelLane
WB
TransitOnly
Lane
WB
TravelLane
EB=Eastbound
WB=Westbound
Parking&
Loading
WB
Protected
BikeLane
WB
TravelLane
WB
TravelLaneParking&
Loading
EB
TravelLaneParking&
Loading
EB
TravelLane
EB
Protected
BikeLane
Parking&
Loading
Transitlane
option:
(notevaluatedin
metricsbelow)
Parking&
loading
laneoption:
(evaluatedin
metricsbelow)
Transitlane
option:
(notevaluatedin
metricsbelow)
Parking&
loading
laneoption:
(evaluatedin
metricsbelow)
OptionCConceptExisting
PineStPikeStUnionStPineStPikeSt
1stAvenueto8thAvenue8thAvenuetoBroadway
DRAFT
*TypicalcrosssectionsbetweenBelmontAveandBoylstonAvelookingeast.*Typicalcrosssectionsbetween5thAveand6thAvelookingeast.
WhatisChanging?
•Westboundtravellane
repurposedforsingle-direction
protectedbikelane
•Route41operateswestbound
fromI-5to1stAve
•NewRoute41-onlybusstop
between4thand3rdAves
•Eastboundtravellane
repurposedforsingle-direction
protectedbikelane
•Improvementstoexisting
busstopsat4thand6thAves
toaccommodateRoute41
passengers
•One-wayeastboundforall
modes
•One-wayprotectedbikelane
•Twotrafficlanes
•Oneflexiblelane–couldbe
usedfortransit,parking,and
loading
•One-waywestboundforall
modes
•One-wayprotectedbikelane
•Twotrafficlanes
•Oneflexiblelane–couldbe
usedfortransit,parking,and
loading
OPTIONC:
ONE-WAYCOUPLETONPIKE&PINESTREETS
•Changeshaveminimaleffectontransitspeedorreliabilitydowntown
•PotentialtoimprovetransitspeedandreliabilityifflexiblelaneeastofI-5isdedicatedtotransit(peakorallday)
•TrafficmodelingshowssignificantcongestioneastboundonPikeStreetduringPMpeakperiod
•Route41wouldrequireimprovedandnewbusstopsandpotentialboardingimprovementstoavoidsidewalkcrowding
•Directionalchangesrequiregreatercapitalinvestmentandwouldtakelongertodesignandconstruct
KEYTAKEAWAYS:

One Center City Surface Options