View source for Sound Transit Express

{{short description|Express bus system in Seattle, Washington}}
{{Use mdy dates|date=December 2023}}
{{Infobox Bus transit
| name            = Sound Transit Express
| logo            = Sound Transit Express logo.svg
| logo_size       = 250
| image           = Sound Transit Express 91717 at Mountlake Terrace TC - wide view.jpg
| image_size      = 250
| image_caption   = A double-decker Sound Transit Express bus on Route 513 at [[Mountlake Terrace station|Mountlake Terrace Freeway Station]]
| company_slogan  = Ride the Wave
| parent          = [[Sound Transit]]
| founded         = 1996
| headquarters    = [[Seattle, Washington]]
| locale          = [[Puget Sound]] region
| service_area    = [[King County, Washington|King]], [[Pierce County, Washington|Pierce]], and [[Snohomish County, Washington|Snohomish]]
| service_type    = [[Public Transit]]
| alliance        = 
| routes          = 23
| destinations    =
| stops           =
| hubs            = 8
| stations        =
| lounge          =
| fleet           = 312 buses
| ridership       = {{American transit ridership|WA Seattle Sound Transit MB daily}} ({{American transit ridership|dailydate}}){{American transit ridership|dailycitation}}
| annual ridership = {{American transit ridership|WA Seattle Sound Transit MB annual}} ({{American transit ridership|annualdate}}){{American transit ridership|annualcitation}}
| fuel_type       = [[compressed natural gas|CNG]], [[Diesel fuel|Diesel]], and [[Diesel-electric hybrid bus|Diesel-electric hybrid]]
| operator        = [[Community Transit]], [[King County Metro]], and [[Pierce Transit]] 
| ceo             =
| website         = {{URL|https://www.soundtransit.org/}}
}}

'''Sound Transit Express''' ('''ST Express''') is a network of regional express buses, operated by the multi-county transit agency, [[Sound Transit]]. The routes connect major regional hubs throughout 53 cities in three counties ([[King County, Washington|King]], [[Pierce County, Washington|Pierce]], and [[Snohomish County, Washington|Snohomish]]) in the [[Puget Sound region]]. Sound Transit Express ranks first in the nation in the number of commuter bus passengers carried and in vehicle miles driven.<ref>{{Cite web|title = CEO Report for January 29, 2016|url = http://www.soundtransit.org/About-Sound-Transit/CEO-Corner|website = Sound Transit|access-date = February 1, 2016|last = Rogoff|first = Peter|date = January 29, 2016}}</ref> The first nine routes and 114 buses began carrying passengers on September 19, 1999.<ref>{{cite news |last=Collins |first=Eric |date=September 20, 1999 |title=Sound Transit's airport bus hits road |pages=[https://www.newspapers.com/clip/113601841/sound-transits-airport-bus-hits-road/ A1], [https://www.newspapers.com/clip/113601845/sound-transits-airport-bus-hits-road/ A10] |work=[[The News Tribune]] |url=https://www.newspapers.com/clip/113601841/sound-transits-airport-bus-hits-road/ |via=[[Newspapers.com]] |accessdate=November 24, 2022}}</ref><ref name="ST-history-1997-2003">{{cite web|title=Regional transit history 1997 - 2003|url=http://www.soundtransit.org/About-Sound-Transit/News-and-events/Reports/1997---2003|publisher=Sound Transit|access-date=March 11, 2017}}</ref> In {{American transit ridership|annualdate}}, the system had a ridership of {{American transit ridership|WA Seattle Sound Transit MB annual}}, or about {{American transit ridership|WA Seattle Sound Transit MB daily}} per weekday as of {{American transit ridership|dailydateasof}}.

Unlike a typical transit bus, Sound Transit Express routes typically make limited stops as they travel longer distances on the freeways. Most routes operate seven days a week, with runs throughout the day. Where available, buses use [[Bus lane|transit-only lanes]], [[high-occupancy vehicle lanes]], [[high-occupancy toll lanes]], [[Local-express lanes|express lanes]], [[bus bypass shoulder]]s,<ref>{{cite news |last=Gutman |first=David |date=November 9, 2018 |title=Buses can avoid morning congestion by using I-5 shoulder lane in Snohomish County |url=https://www.seattletimes.com/seattle-news/transportation/buses-can-avoid-congestion-by-using-i-5-shoulder-lane-in-snohomish-county/ |work=The Seattle Times |access-date=June 24, 2023}}</ref> and direct access ramps to speed travel times.

While Sound Transit oversees, plans, and funds the service, operation and maintenance of the buses is contracted out to [[Community Transit]] (who [[Subcontractor|subcontracts]] with [[Transdev]]), [[King County Metro]] and [[Pierce Transit]].<ref>{{cite news |last=Johnson |first=Matthew |date=December 10, 2015 |title=Q. Who's driving those Sound Transit buses and trains? |url=https://www.soundtransit.org/blog/platform/q-who-s-driving-those-sound-transit-buses-and-trains |work=The Platform |publisher=Sound Transit |access-date=June 1, 2021}}</ref>

==Fares==
ST Express uses a flat fare system, where each ride costs the same regardless of distance.

The fares are as follows:

{| class=wikitable style="text-align:center"
|-
! Fare type!! All
|-
| '''Adult''' || $3.25
|-
| '''Senior (65+) / Disabled / Medicare'''<br /><small>(Regional Reduced Fare Permit required)</small> || $1.00
|-
|'''Low-income'''<br /><small>(ORCA LIFT card required)</small>
|$1.00
|-
| '''Youth'''<br /><small>(6–18 years)</small>|| Free
|-
| '''Children'''<br /><small>(0–5 years, with fare paying passenger)</small> || colspan=2| Free 
|}

Paper transfers are not accepted or issued on Sound Transit routes. Passengers who use [[ORCA card|ORCA]] may transfer between ST routes or routes operated by most other agencies within two hours of initial payment. If the fare for the second route is higher, the difference will be charged.

==Routes==
[[File:545 Eastbound at Montlake (5140048599).jpg|thumbnail|left|Sound Transit Express route 545 serving the Montlake Freeway Station]]

23 Sound Transit Express bus routes are overseen by the agency.<ref name="stexpress">{{cite web|url=http://www.soundtransit.org/stexpress |title=Sound Transit: ST Express Regional Bus Service |access-date=November 10, 2009 |publisher=[[Sound Transit]] }}</ref> Buses are operated under contract by King County Metro, Pierce Transit and Community Transit (who [[Subcontractor|subcontracts]] with [[Transdev]]).<ref name="ST-LostFound">{{cite web |title=Lost and found |url=https://www.soundtransit.org/help-contacts/lost-found |publisher=Sound Transit |accessdate=October 3, 2021}}</ref> When Sound Transit implements a new bus route, changes are frequently made to existing routes that serve the area to avoid overlapping.

The ST Express routes and operators {{as of|2024|9|14|lc=y|df=US}} are:<ref>{{cite press release |date=March 22, 2024 |title=Sound Transit announces March 2024 Service Change |url=https://www.soundtransit.org/get-to-know-us/news-events/news-releases/sound-transit-announces-march-2024-service-change |publisher=Sound Transit |accessdate=March 30, 2024}}</ref>

{{clear}}
{| class="sortable wikitable"
! width=5% | '''Route'''
! width=10% | '''Off-peak service'''
! width=10% | '''Weekend service'''
! width=15% | '''Start'''
! width=40% | '''Via'''
! width=15% | '''End'''
! width=5% | '''Operator'''
|-
| 510 
| {{no|No<br /><small>(use route 512)</small>}}
| {{no|No<br /><small>(use route 512)</small>}}
| Downtown Seattle
| [[Interstate 5 in Washington|I-5]], South Everett Freeway Station, Mountlake Terrace Freeway Station
| rowspan="2" | [[Everett Station]]
----
Downtown Everett <small>(select trips only)</small>
| rowspan="4" | Community Transit
|-
| 512
| {{yes}}
| {{yes}}
| rowspan="3" | Lynnwood City Center Station
| Ash Way Park & Ride, South Everett Freeway Station
|-
| 513
| {{no}}
| {{no}}
| Ash Way Park & Ride, Eastmont Park & Ride
| Seaway Transit Center
|-
|515
| {{no}}
| {{no}}
|I-5, Mountlake Terrace Freeway Station
|Downtown Seattle
|-
| 522
| {{yes}}
| {{yes}}
| [[Roosevelt station (Sound Transit)|Roosevelt Station]]
| Lake City Way, Bothell Way NE, Ballinger Way, Kenmore Park & Ride 
| [[University of Washington, Bothell]]/[[Cascadia College]]
----
Woodinville Park & Ride <small>(select trips only)</small>
| King County Metro
|-
| 532
| {{no|No<br /><small>(use routes 535 & 512)</small>}}
| {{no}}
| rowspan="2" | [[Downtown Bellevue]]
| Bellevue Transit Center, Totem Lake Freeway Station, Brickyard Freeway Station <small>(reverse peak only)</small>, [[Interstate 405 (Washington)|I-405]] & NE 195th <small>(reverse peak only)</small>, Canyon Park Park & Ride , Ash Way Park & Ride, South Everett Freeway Station
| Everett Station
| rowspan="2" | Community Transit
|-
| 535
| {{yes}}
| {{partial|Saturday only}}
| Bellevue Transit Center, Totem Lake Freeway Station, Brickyard Freeway Station, Bothell Park & Ride, University of Washington, Bothell/Cascadia College, Canyon Park Park & Ride, [[Alderwood Mall]]
| Lynnwood Transit Center
|-
| 542
| {{yes}}
| {{yes}}
| [[U District station|U District Station]]
| University of Washington, University of Washington Station, Evergreen Point Freeway Station, Yarrow Point Freeway Station, Overlake Transit Center, SR 520 & NE 51st Freeway Station, Downtown Redmond
| Redmond Transit Center
| rowspan="5" | King County Metro
|-
| 545
| {{yes}}
| {{yes}}
| rowspan="3" | Downtown Seattle
| Capitol Hill <small>(select trips)</small>, Montlake Freeway Station (closed since 2019),<ref>{{cite news |date=May 2019 |title=Montlake Freeway Station closure begins June 22, 2019 |url=https://www.soundtransit.org/sites/default/files/documents/mountlake-freeway-station-closure-fact-sheet.pdf |publisher=Washington State Department of Transportation |accessdate=November 24, 2022}}</ref> Evergreen Point Freeway Station, Yarrow Point Freeway Station, Overlake Transit Center, SR 520 & NE 51st Freeway Station, Downtown Redmond, Redmond Transit Center
| Bear Creek Park & Ride
|-
| 550
| {{yes}}
| {{yes}}
| Mercer Island Park & Ride, South Bellevue Park & Ride, Bellevue, Bellevue Transit Center
| Bellevue <small>([[King County Library System|Library]])</small>
|-
| 554
| {{yes}}
| {{yes}}
| Mercer Island Park & Ride, Eastgate Freeway Station, Issaquah Transit Center, Issaquah Highlands Park & Ride
| Issaquah Highlands Park & Ride
----
Redmond <small>(185th Avenue NE & Redmond/Fall City Road, select weekday trips only)</small>
|-
| 556
| {{no}}
| {{no}}
| U District Station
| University District (Seattle), University of Washington, University of Washington Station, Evergreen Point Freeway Station, Yarrow Point Freeway Station, Bellevue Transit Center, South Bellevue Park & Ride, Eastgate Freeway Station, Issaquah Transit Center
| Issaquah Highlands Park & Ride
|-
| 560
| {{yes}}
| {{yes}}
| Bellevue Transit Center
| Newport Hills Park & Ride, Kennydale Freeway Station, Renton, Renton Transit Center, [[Seattle-Tacoma International Airport|Sea-Tac Airport]], [[SeaTac/Airport (Link station)|SeaTac/Airport Station]], Burien Transit Center
| Westwood Village
| Pierce Transit 
|-
| 566
| {{yes}}
| {{no}}
| Remond Technology Station (select trips)
----
State Route 520 & NE 40th St (select trips)
| Bellevue Transit Center, Newport Hills Park & Ride <small>(off peak only)</small>, Kennydale Freeway Station <small>(off peak only)</small>, Renton, Renton Transit Center, [[Kent (Sounder station)|Kent Station]] (select trips), Auburn Park & Ride (select trips)
| Kent Station (select trips) Auburn Transit Center
| King County Metro
|-
| 574
| {{yes}}
| {{yes}}
| Sea-Tac Airport
| SeaTac/Airport Station, Kent/Des Moines Freeway Station, Star Lake Freeway Station, Federal Way Transit Center, [[Tacoma Dome (Sounder station)|Tacoma Dome Station]], SR 512 Park & Ride
| Lakewood Transit Center
| rowspan="9" | Pierce Transit
|-
| 577
| {{yes}}
| {{yes}}
| rowspan="2" | Downtown Seattle
| I-5
| Federal Way Transit Center
|-
| 578
| {{yes}}
| {{yes}}
| Federal Way Transit Center, [[Auburn (Sounder station)|Auburn Station]], [[Sumner (Sounder station)|Sumner Station]]
| [[Puyallup (Sounder station)|Puyallup Station]] 
|-
| 580
| {{no}}
| {{no}}
| [[Puyallup (Sounder station)|Puyallup Station]]
| 9th St SW
| South Hill Park and Ride
|-
| 586
| {{no}}
| {{no}}
| University District (Seattle)
| [[University of Washington Medical Center]], SR 520, I-5, Federal Way Transit Center
| Tacoma Dome Station
|-
| 590
| {{no|No<br /><small>(use route 594)</small>}}
| {{no|No<br /><small>(use route 594)</small>}}
| rowspan="4" | Downtown Seattle
| SODO Busway, Tacoma Dome Station
| Tacoma Dome Station
----
Downtown Tacoma <small>(one early morning trip only)</small>
|-
| 592
| {{no}}
| {{no}}
| SR 512 Park & Ride, Lakewood Station
| DuPont Station
|-
| 594
| {{yes}}
| {{yes}}
| SODO Busway, Tacoma Dome Station, [[University of Washington Tacoma]], Downtown Tacoma, SR 512 Park & Ride
| [[Lakewood (Sounder station)|Lakewood Station]]
----
DuPont Station <small>(select trips only)</small>
|-
| 595
| {{no}}
| {{no}}
| SODO Busway, [[Tacoma Community College]] Transit Center, Narrows Park & Ride, Kimball Drive Park & Ride
| Gig Harbor <small>(Purdy Park & Ride)</small>
|-
| 596
| {{no}}
| {{no}}
| Sumner Station
| SR 410
| Bonney Lake Park & Ride
|}

==Fleet==
Sound Transit owns a fleet of 360 buses<ref name='2015 Draft SIP' /> operated by three different local transit agencies. Sound Transit buses are painted white with aqua, turquoise, and blue waves along the sides, representing the [[Puget Sound]] region ST Express serves, and most feature a freely-adapted representation of the Sound Transit bus and train system map on the seating fabric.

Occasionally, vehicles that are not in Sound Transit livery are used on Sound Transit routes by the operating agencies. Also, Sound Transit vehicles may also be used by the local agencies for other commuter routes. This is due to vehicles having mechanical problems, vehicle allocation issues, and assignment errors.

{| class="wikitable"
|-
! Manufacturer and model !! Image !! Motor !! Length !! Passengers !! Purchased !! Qty !! Fleet Numbers !! Operator
|-
!rowspan=1| [[Gillig]] [[Gillig Phantom|Phantom]]
|rowspan=1| [[Image:Sound Transit Gillig Phantom 9105-P.jpg|150px]]
|rowspan=1|Cummins [[Cummins L Series engine|ISL]] / Allison B400R
|rowspan=1| 40'
|rowspan=1| 42 (seated)
|rowspan=1|2007
|22
|9092–9113
|Pierce Transit
|-
!rowspan=2| [[New Flyer Low Floor|New Flyer DE60LF]]
|rowspan=2| [[Image:Sound Transit New Flyer DE60LF.jpg|150px]]
|rowspan=2|Cummins ISL / GM-Allison E<sup>P</sup>50
|rowspan=2| 60'
|rowspan=2| 56 (seated)
| 2007–2008 || 2<ref name='motion2009-15' /> || 9622–9623
|rowspan=2| King County Metro
|-
|-
| 2009 || 13<ref name='motion2009-15'>{{cite web |url=http://www.soundtransit.org/documents/pdf/about/board/motions/2009/Motion%20M2009-15sr.pdf |title=MOTION NO. M2009-15: Contract with New Flyer Corporation |access-date=July 23, 2009 |year=2009 |publisher=Sound Transit |url-status=dead |archive-url=https://web.archive.org/web/20100620203815/http://soundtransit.org/documents/pdf/about/board/motions/2009/Motion%20M2009-15sr.pdf |archive-date=June 20, 2010 }}</ref> || 9624–9636

|-
! rowspan="1"|[[Gillig Low Floor]] BRT Hybrid
| [[File:Sound Transit Gillig BRT bus 9205 in downtown Seattle (2014).jpg|150px]]
| Cummins ISL / Allison H 40 EP
| 40' 
| 35 (seated)<ref name='M2011-04sr' /> 
| 2008
| 22<ref name='M2011-04sr'>{{cite web | url = https://www.soundtransit.org/st_sharepoint/download/sites/PRDA/FinalRecords/2011/Motion%20M2011-04sr.pdf | title = MOTION NO. M2011-04 Purchase 24 Forty-Foot Replacement Buses | access-date = February 25, 2011 | date = February 24, 2011 | publisher = Sound Transit}}</ref> 
| 6901–6930
|rowspan="4"| Pierce Transit
|-
! rowspan="3" |[[MCI D-Series|Motor Coach Industries D4500CL]]
| rowspan="3" |[[Image:Sound Transit MCI.jpg|150px]]
|rowspan="3"| Detroit Diesel Series 60 EGR
| rowspan="3" |45'<ref name="45ft" />
| rowspan="3" |57 (seated)
| 2008 || 7<ref name='2015 Draft SIP' /> || 9713–9719
|-
| 2009 || 3<ref name='2015 Draft SIP' /> || 9720–9722
|-
| 2010 ||17<ref name='2015 Draft SIP' /> || 9723–9739
|-
! rowspan="7" |New Flyer D60LFR
| rowspan="3" |[[File:Sound Transit Express 9555C at Bellevue TC (8755138870).jpg|150x150px]]
| rowspan="3" | Cummins [[Cummins L Series engine|ISL9]]
| rowspan="3" | 60'
| rowspan="3" | 56 (seated)<ref name="2011-02-24">{{cite web |url=http://www.soundtransit.org/x15192.xml |access-date=February 24, 2011 |title=Sound Transit: Sound Transit board approves purchase of clean diesel and hybrid buses |date=February 24, 2011 |publisher=Sound Transit |archive-date=February 28, 2011 |archive-url=https://web.archive.org/web/20110228234910/http://www.soundtransit.org/x15192.xml |url-status=dead }}</ref>
| 2010
| 13<ref name="motion2010-01" />
| 9553–9565
| Community Transit
|-
| rowspan="2" | 2011
|1
| 9566
|Community Transit
|-
|17
|9567–9583
|King County Metro
|-
| rowspan="4" |[[File:Sound Transit Express 51215C leaving South Everett (18960395342).jpg|150px]]
| rowspan="4" |Cummins ISL9
| rowspan="4" |60'
| rowspan="4" |56 (seated)
| rowspan="2" |2011
|3
| 9584–9586
| rowspan="4" | King County Metro
|-
|10
| 9587–9596
|-
| rowspan="2" | 2012 || 14 || 9800–9813
|-
| 5 || 9818–9822
|-
!rowspan=2| New Flyer DE60LFR
|rowspan=2| [[Image:Sound Transit DE60LFR.jpg|150px]]
|rowspan=2| Cummins ISL9 / Allison H 50 EP
|rowspan=2| 60'
|rowspan=2| 56 (seated)
| 2010
| 11<ref name='motion2010-01'>{{cite web |url=http://www.soundtransit.org/documents/pdf/about/board/motions/2010/Motion%20M2010-01sr.pdf |title=MOTION NO. M2010-01: ST Express Bus Procurement&nbsp;– ST2 Expansion Service |access-date=January 18, 2010 |date=January 14, 2010 |publisher=Sound Transit |url-status=dead |archive-url=https://web.archive.org/web/20100620162933/http://soundtransit.org/documents/pdf/about/board/motions/2010/Motion%20M2010-01sr.pdf |archive-date=June 20, 2010 }}</ref>
| 9637–9647
|rowspan=2| King County Metro
|-
| 2011
| 4<ref name='2015 Draft SIP' />
| 9648–9651
|-
!|[[Gillig Low Floor]] BRT Hybrid
|
| Cummins ISL9 / Allison H 40 EP
| 40' 
| 35 (seated)<ref name='M2011-04sr' /> 
| 2012
| 22<ref name='M2011-04sr'/> 
| 9201–9222
|rowspan=3| Pierce Transit
|-
!rowspan=2| Gillig Low Floor BRT
|rowspan=2| [[File:Sound Transit Express 9122P IMG 3406 (2).jpg|150px]]
|rowspan=2| Cummins ISL9
|rowspan=2| 40' 
|rowspan=2| 35 (seated)
| 2012
| 2<ref name='2015 Draft SIP' />
| 9122–9123
|-
| 2015
| 3<ref name='2015 Draft SIP' />
| 9124–9126
|-
! rowspan="3" | [[New Flyer Xcelsior]] XDE60
| rowspan="3" | [[File:STEX 61404P in Downtown Seattle.jpg|150px]]
|rowspan=2| Cummins ISL9 / Allison H 50 EP
|rowspan=2| 60'
|rowspan=2| 57 (seated)
| 2014
| 8<ref name="2015 Draft SIP">{{cite web|title=Draft 2015 Service Implementation Plan - Appendix B: Fleet Plans|url=http://www.soundtransit.org/Documents/Draft%202015%20SIP%2010-10-2014(0).pdf|publisher=Sound Transit|access-date=November 8, 2014|page=111|url-status=dead|archive-url=https://web.archive.org/web/20141108220227/http://www.soundtransit.org/Documents/Draft%202015%20SIP%2010-10-2014%280%29.pdf|archive-date=November 8, 2014}}</ref>
| 9652–9659
| King County Metro
|-
| 2014
| 7<ref name='2015 Draft SIP' />
| 61401–61407
| Pierce Transit
|-
| Cummins L9 / BAE Systems HybriDrive Series-E
| 60'
| 52 (Seated)
| 2020
| 31
| 9660–9690
| King County Metro
|-
!rowspan=2| New Flyer Xcelsior XD60
|rowspan=2| [[File:Sound Transit Express 51401P in Downtown Seattle (21307069444).jpg|150px]]
|rowspan=2| Cummins ISL9
|rowspan=2| 60'
|rowspan=2| 57 (seated)
| 2014
| 4<ref name='2015 Draft SIP' />
| 9814–9817
| King County Metro
|-
| 2014
| 3<ref name='2015 Draft SIP' />
| 51401–51403
| Pierce Transit
|-
! rowspan="3" | [[Alexander Dennis Enviro500 MMC]]
| rowspan="3" | [[File:Sound Transit double-decker bus 91711 on route 512, August 2018.jpg|150px]]
| rowspan="2" |Cummins ISL9
| rowspan="2" | 42'
| rowspan="2" | 82 (seated)
| 2015
| 5<ref name='2015 Draft SIP' />
| 91501–91505
| rowspan="3" | Community Transit
|-
|2017
|32
|91701–91732
|- 
|Cummins L9
| 42'
| 82 (seated)
|2020
|13
|91901–91913
|-- 
! rowspan="2" | Gillig Low Floor BRTPlus CNG
| rowspan="2" | [[File:Sound Transit Gillig 40' Low Floor CNG (24333018094).jpg|150px]]
| rowspan="2" | Cummins Westport ISL G
| rowspan="2" | 40' 
| rowspan="2" | 35 (seated)
| 2015
| 17<ref name=M2014-06>{{cite web|title=MOTION NO. M2014-06|url=http://www.soundtransit.org/sites/default/files/documents/pdf/about/board/motions/2014/Motion_M2014-06.pdf|access-date=December 31, 2015|date=March 27, 2014}}</ref>
| 41501–41517
| rowspan="2" | Pierce Transit
|-
|2016
|5
|41601–41605
|--
!Motor Coach Industries D4500CT CNG
|[[File:Sound Transit Express 9302P 2017-06-07 17.13.31 (2).jpg|150px]]
|Cummins Westport [[Cummins ISX|ISX12]] G
|45'
|57 (seated)
|2016
|12
|9301–9312
|Pierce Transit
|}

== Retired fleet ==
{| class="wikitable"
|-
! Manufacturer and model !! Image !! Motor !! Length !! Passengers !! Purchased !! Retired !! Qty !! Fleet Numbers !! Operator !! Notes
|-
| '''OBI Orion V CNG (05.501)'''
|[[File:Sound Transit 826.jpg|150px]]
| Cummins L10G / ZF HP500
| 40'
| 42
| 1994
| 2008
| 27
| 801–827
| Pierce Transit
| Ex-Pierce Transit; bought in 1998. Retired in 2008.
|-
|'''[[Società Italiana Ernesto Breda|Breda]] DuoBus 350<br />(ADPB 350) [[Dual-mode bus|Dual-mode]]'''
|
| Detroit Diesel 6V92TA / ZF 4HP590C
| 60'
| 63
| 1990
| 2005
| 20
| 5019–5021, 5194–5210
| King County Metro
| Leased from King County Metro Transit in 1999. Retired in 2005. Replaced by DE60LFs.
|-
| rowspan=4| '''Gillig Phantom 40''''
| rowspan=4| [[File:Sound Transit Express 9091K IMG 0845.jpg|150px]]
| rowspan=2| Cummins ISM / Allison B400R
| rowspan=4| 40'
| rowspan=4| 42
| 1999
| 2014
| 70
| 9000–9069
| King County Metro / Pierce Transit / Community Transit
| All retired from Sound Transit Fleet.
* As of June 2014, some of the coaches sold to Pierce Transit are temporarily wrapped in ST for PT operated routes due to a bus shortage. 
* Ben Franklin Transit purchased a handful. 
* Transit Sales International purchased some as well.
|-
| 2001
| 2014
| 20
| 9070–9089
| King County Metro
| Retired in 2014.
|-
| Cummins ISL / Voith D864.5
| 2005
| 2020
| 2
| 9090–9091
| King County Metro
| Retired in 2020. Replaced by XDE60s.
|-
| Cummins [[Cummins L Series engine|ISL]]
| 2008
| 2020
| 8
| 9114–9121
| Community Transit
| Retired in 2020. Replaced by ADL Enviro500 MMC.
|-
| '''[[New Flyer]] DE40LF'''
| [[File:Sound Transit Express 9200K GHBX0482.jpg|150px]]
| Cummins ISB / Allison E<sup>P</sup>40
| 40'
| 34
| 2003
| 2020
| 1
| 9200
| King County Metro
| Retired in 2020. Replaced by XDE60s.
|-
| '''New Flyer C40LF'''
| 
| Cummins Westport C Gas Plus / Allison B400R
| 40'
| 39
| 2001
| 2014
| 20
| 9400–9419
| Pierce Transit
| Retired in 2014. Replaced by Gillig CNG Low Floor BRT.
|-
| rowspan=3| '''New Flyer D60LF'''
|
| Detroit Diesel Series 50 / Allison B500R
| rowspan=3| 60'
| rowspan=3| 56
| 1999
| 2016
| 25
| 9500–9524
| Pierce Transit / King County Metro / Community Transit
| Retired in 2016. Some units were bought by Transit Sales International.
|-
| [[File:Sound Transit D60LF 9536-K.jpg|150px]]
| Detroit Diesel Series 50 EGR / Allison B500R
| 2000
| 2019
| 12
| 9525–9536
| Community Transit / King County Metro
| Retired in 2019. Some units were bought by Transit Sales International.
|-
| [[File:Sound Transit Express 9552P IMG 1638.jpg|150px]]
| Caterpillar C9 / Allison B500R
| 2004
| 2020
| 16
| 9537–9552
| Community Transit / King County Metro / Pierce Transit
| Retired in 2020. 
|-
| '''New Flyer DE60LF'''
| [[File:Sound Transit Express 9612K 2017-02-10 11.01.23 (2).jpg|150px]]
| Caterpillar C9 / Allison E<sup>P</sup>50 Hybrid System
| 60'
| 56
| 2005
| 2020
| 22
| 9600–9621
| King County Metro
| Retired on Thursday, August 27, 2020; 9609K - final active unit. Replaced by XDE60s.
|-
![[Motor Coach Industries]] [[MCI 102DL3 & D4500|D4500]]
|[[File:Sound Transit Express buses on I-5 in Pierce County (8754008963).jpg|150x150px]]
|Detroit Diesel [[Series 60]]<ref name=45ft>{{cite web |url=http://www.soundtransit.org/x4642.xml |title=ST Express 45-foot Long-Haul Bus Specifications (MCI) |access-date=May 19, 2007 |publisher=Sound Transit |url-status=dead |archive-url=https://web.archive.org/web/20070919230823/http://www.soundtransit.org/x4642.xml |archive-date=September 19, 2007 }}</ref>
| 45'<ref name=45ft/>
| 57 (seated)
| 2005 
| 2022
| 13<ref name='motion2009-09'>{{cite web |url=http://www.soundtransit.org/documents/pdf/about/board/motions/2009/Motion%20M2009-09sr.pdf |title=MOTION NO. M2009-09: Contract with Motor Coach Industries |access-date=July 23, 2009 |publisher=Sound Transit |url-status=dead |archive-url=https://web.archive.org/web/20100620200630/http://soundtransit.org/documents/pdf/about/board/motions/2009/Motion%20M2009-09sr.pdf |archive-date=June 20, 2010 }}</ref> || 9700–9712
| Pierce Transit
| Retired on July 29, 2022; 9712P - final active unit service was on rt. 578 to Puyallup via Federal Way and I-5.
|}

==References==
{{reflist}}

==External links==
{{commons category|Sound Transit Express}}
*[https://www.soundtransit.org/Rider-Guide/ST-Express-bus ST Express Rider Guide]

{{Puget Sound Transit}}

[[Category:Sound Transit Express| ]]
[[Category:Sound Transit| ]]
[[Category:1999 establishments in Washington (state)]]
[[Category:Bus transportation in Washington (state)]]
[[Category:Intermodal transportation authorities in Washington (state)]]
[[Category:Transportation in King County, Washington]]
[[Category:Transportation in Pierce County, Washington]]
[[Category:Transportation in Snohomish County, Washington]]