Sound Transit (ST), officially the Central Puget Sound Regional Transit Authority, is a
public transit
Public transport (also known as public transportation, public transit, mass transit, or simply transit) is a system of transport for passengers by group travel systems available for use by the general public unlike private transport, typic ...
agency serving the
Seattle metropolitan area in the
U.S. state of
Washington. It operates the
Link light rail system in
Seattle
Seattle ( ) is a port, seaport city on the West Coast of the United States. It is the county seat, seat of King County, Washington, King County, Washington (state), Washington. With a 2020 population of 737,015, it is the largest city in bo ...
and
Tacoma, regional
Sounder commuter rail, and
Sound Transit Express bus service. The agency also coordinates the regional
ORCA
The orca or killer whale (''Orcinus orca'') is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is the only extant species in the genus '' Orcinus'' and is recognizable by its black-and-white ...
fare card system, which is also used by local transit operators. In 2017, Sound Transit services carried a total of 47 million passengers and averaged 157,000 riders on weekdays.
Sound Transit was created in 1993 by
King
King is the title given to a male monarch in a variety of contexts. The female equivalent is queen, which title is also given to the consort of a king.
*In the context of prehistory, antiquity and contemporary indigenous peoples, the ...
,
Pierce and
Snohomish counties to build a regional
rapid transit
Rapid transit or mass rapid transit (MRT), also known as heavy rail or metro, is a type of high-capacity public transport generally found in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be c ...
system. After an unsuccessful proposal in 1995, the agency's plan for regional light rail, commuter rail, and express bus service, named "Sound Move", was approved in November 1996. ST began operating its
express bus service in September 1999, taking over existing routes from local transit agencies.
The region's first
commuter rail
Commuter rail, or suburban rail, is a passenger rail transport service that primarily operates within a metropolitan area, connecting commuters to a central city from adjacent suburbs or commuter towns. Generally commuter rail systems are co ...
line, between
Tacoma and Seattle, started in December 2000; the agency's first light rail line,
Tacoma Link (now the
T Line), began service in August 2003. Light rail service in Seattle on
Central Link (now the
1 Line) began in 2009, and is the largest part of the Sound Transit system in terms of ridership.
Union Station in Seattle has served as the agency's headquarters since its renovation in 1999.
Sound Transit is independent of local transit agencies and is governed by an eighteen-member Board of Directors made up of elected officials from member jurisdictions and the
Secretary of Transportation
A secretary, administrative professional, administrative assistant, executive assistant, administrative officer, administrative support specialist, clerk, military assistant, management assistant, office secretary, or personal assistant is a w ...
. It is funded by local
sales taxes,
property taxes, and
motor vehicle excise taxes, levied within its taxing district in portions of King, Pierce and Snohomish counties. The agency has passed three major
ballot measure
A referendum (plural: referendums or less commonly referenda) is a direct vote by the electorate on a proposal, law, or political issue. This is in contrast to an issue being voted on by a representative. This may result in the adoption of ...
s to fund system expansion: Sound Move (1996),
Sound Transit 2 (2008) and
Sound Transit 3 (2016). Planning and construction of new light rail lines is scheduled to continue until 2041 under the Sound Transit 3 plan, which would expand the network to and 70 stations.
Services
Sound Transit operates three transit services across the Seattle metropolitan area: the
Link light rail system in Seattle and Tacoma; the
Sounder commuter rail system from Everett to Lakewood, via Seattle; and the
Sound Transit Express bus system across the three counties. In 2017, these systems carried more than 47 million passengers, averaging 156,000 riders on weekdays.
All three modes accept cash payment and mobile tickets as well as the regional
ORCA card, a contactless
proximity card with stored fares and passes.
Link light rail
The
Link light rail system currently encompasses two lines with of track and 25 stations. The two lines, which have no direct connection, are the
1 Line between
Seattle
Seattle ( ) is a port, seaport city on the West Coast of the United States. It is the county seat, seat of King County, Washington, King County, Washington (state), Washington. With a 2020 population of 737,015, it is the largest city in bo ...
,
Tukwila, and
SeaTac; and the
T Line in central
Tacoma.
Link light rail trains carried 23 million passengers in 2017, averaging 71,058 on weekdays,
making it the
10th-busiest light rail system in the United States.
Link trains generally run seven days a week at frequencies of 6 to 24 minutes, with stops spaced closely together. Most stations offer connections to nearby buses or a
park and ride
A park and ride, also known as incentive parking or a commuter lot, is a parking lot with public transport connections that allows commuters and other people heading to city centres to leave their vehicles and transfer to a bus, rail system ...
facility.
The system is planned to expand to over 70 stations and by 2041, with five lines serving all three counties.
1 Line trains are operated and maintained under contract with
King County Metro and are able to carry more passengers, serving as the regional
rapid transit
Rapid transit or mass rapid transit (MRT), also known as heavy rail or metro, is a type of high-capacity public transport generally found in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be c ...
system.
T Line trains are akin to
streetcar
A tram (called a streetcar or trolley in North America) is a rail vehicle that travels on tramway tracks on public urban streets; some include segments on segregated right-of-way. The tramlines or networks operated as public transport ...
s, unable to be coupled into pairs, and are operated and maintained by Sound Transit staff (the only service in the system to not have operations and maintenance performed under contract).
Sounder commuter rail
Sounder
Sounder may refer to:
* ''Sounder'' (novel), a book by William H. Armstrong
* ''Sounder'' (film), a film based on the novel
*Sounder, a group of wild boar or domestic pigs foraging in woodland; see List of animal names
*Sounder, a device that tra ...
is the regional
commuter rail
Commuter rail, or suburban rail, is a passenger rail transport service that primarily operates within a metropolitan area, connecting commuters to a central city from adjacent suburbs or commuter towns. Generally commuter rail systems are co ...
service managed by Sound Transit and has two lines that intersect at
King Street Station in
Downtown Seattle. Trains generally run during
rush hours with limited service at other times, including weekend trains for sporting events. The N Line connects Seattle to
Everett, stopping at two intermediate stations in
Snohomish County. The S Line connects Seattle to
Tacoma and
Lakewood Lakewood may refer to:
Places Australia
* Lakewood, Western Australia, an abandoned town in Western Australia
Canada
* Lakewood, Edmonton, Alberta
* Lakewood Suburban Centre, Saskatoon, Saskatchewan
Philippines
* Lakewood, Zamboanga del S ...
, stopping at six other stations. Trains are operated under contract by
BNSF Railway on leased tracks and maintained under contract by
Amtrak
The National Railroad Passenger Corporation, doing business as Amtrak () , is the national passenger railroad company of the United States. It operates inter-city rail service in 46 of the 48 contiguous U.S. States and nine cities in Canada ...
.
Sound Transit Express
Sound Transit Express is a network of 28 limited-stop express bus routes providing regional service to cities in all three counties, primarily using a network of
high-occupancy vehicle lane
A high-occupancy vehicle lane (also known as an HOV lane, carpool lane, diamond lane, 2+ lane, and transit lane or T2 or T3 lanes) is a restricted traffic lane reserved for the exclusive use of vehicles with a driver and one or more passengers, ...
s (HOV lanes) on state-maintained freeways. Some routes operate seven days a week, while others are limited to rush hours only.
The bus fleet is owned by Sound Transit and buses are operated and maintained under contracts with local transit authorities (
Community Transit,
King County Metro, and
Pierce Transit).
Two
bus rapid transit
Bus rapid transit (BRT), also called a busway or transitway, is a bus-based public transport system designed to have much more capacity, reliability and other quality features than a conventional bus system. Typically, a BRT system includes ...
lines, on Interstate 405 and State Route 522, are planned to open in 2026–27 and be known as "Stride".
Organization
Management
Sound Transit has 802 full-time employees and is headquartered at
Union Station in Seattle.
The
chief executive officer
A chief executive officer (CEO), also known as a central executive officer (CEO), chief administrator officer (CAO) or just chief executive (CE), is one of a number of corporate executives charged with the management of an organization especial ...
(CEO) of Sound Transit is Julie Timm, who was appointed in 2022 and was formerly the head of the
Greater Richmond Transit Company in Virginia. Her predecessor was
Peter Rogoff, the former
Federal Transit Administrator from 2009 to 2014. Rogoff was hired in 2015 and succeeded
Joni Earl, a former city administrator who became Sound Transit CEO in 2001.
The agency has three oversight committees that are filled by citizens from the Sound Transit district. The Citizen Oversight Panel oversees compliance to board policies and financial plans, and is composed of 15 members serving four-year terms after their appointment by the board of directors. The Diversity Oversight Committee promotes employment and contracting opportunities for underprivileged groups and includes members representing community organizations and business organizations. The Citizens Accessibility Advisory Committee has 15 members who represent passengers with disabilities, mobility issues, or are senior citizens. The advisory committee monitors the agency's compliance with the
Americans with Disabilities Act
The Americans with Disabilities Act of 1990 or ADA () is a civil rights law that prohibits discrimination based on disability. It affords similar protections against discrimination to Americans with disabilities as the Civil Rights Act of 19 ...
and other accessibility requirements.
Board of directors
Sound Transit is governed by a
board of directors with 18 members who are appointed based on their positions in regional and local governments. One seat is held by the
Washington State Secretary of Transportation, while the remaining seventeen are allocated proportional to their population within the Sound Transit district, with each seat representing approximately 145,000 people.
The three
county executives of
King
King is the title given to a male monarch in a variety of contexts. The female equivalent is queen, which title is also given to the consort of a king.
*In the context of prehistory, antiquity and contemporary indigenous peoples, the ...
,
Pierce, and
Snohomish counties are members of the board and also appoint their remaining seats from local elected positions with approval of the county councils.
The agency's policies are set by the board through their decisions, including maintenance of the long-range plan, budget, and project details. The full board meets at Union Station on the fourth Thursday of the month, which are open to the public and streamed online. The board selects a Chair and two Vice Chairs to serve two-year terms and also assign members to four committees: the Executive Committee, Rider Experience and Operations, System Expansion, and Finance and Audit. In the event that the Chair or Vice Chairs leave office or are otherwise unable to serve their full term, the vacancy can be filled by another member for the remainder of the term.
, the board members are:
Funding
For its 2017 budget, Sound Transit expected annual revenue of $1.6 billion. 93% of that revenue to come from taxes, predominately local
sales taxes,
property taxes, and
motor vehicle excise taxes, levied within its taxing district in portions of King, Pierce, and Snohomish counties. Passenger fares, investments, and advertising income make up the remaining 7% of revenue.
The agency has successfully passed three major
ballot measure
A referendum (plural: referendums or less commonly referenda) is a direct vote by the electorate on a proposal, law, or political issue. This is in contrast to an issue being voted on by a representative. This may result in the adoption of ...
s to fund system expansion, including Sound Move (1996),
Sound Transit 2 (2008), and
Sound Transit 3 (2016). Planning and construction of new light rail lines is anticipated to continue until 2041 under the Sound Transit 3 plan. Capital improvement projects will cost $1.3 billion in 2017.
Sound Transit's day-to-day operations were expected to lose $190 million in 2017. Tax revenues exceeded the capital improvement budget for the year, so the net loss should be $131 million.
Police

Sound Transit contracts with the
King County Sheriff's Office for police services. Deputies assigned to Sound Transit wear Sound Transit uniforms and drive
patrol cars marked with the Sound Transit logo. There is currently one chief, one captain, five sergeants, four detectives, 23 patrol officers, and a crime analyst assigned full-time to Sound Transit.
Sound Transit officers patrol Sound Transit property around Puget Sound including vehicles (trains & buses) and stations.
History
Background
Throughout the 20th century, Seattle planners and voters rejected various proposals for
rapid transit
Rapid transit or mass rapid transit (MRT), also known as heavy rail or metro, is a type of high-capacity public transport generally found in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be c ...
systems. The
Forward Thrust
The Forward Thrust ballot initiatives were a series of bond propositions put to the voters of King County, Washington in 1968 and 1970, designed by a group called the Forward Thrust Committee. Seven of the twelve propositions in 1968 were successf ...
program of the late 1960s produced two ballot measures for a rapid transit system that were unable to pass with the state-required supermajority for bonds. Federal funding that was allocated to the project was instead sent to
Atlanta, Georgia
Atlanta ( ) is the capital and most populous city of the U.S. state of Georgia. It is the seat of Fulton County, the most populous county in Georgia, but its territory falls in both Fulton and DeKalb counties. With a population of 498,71 ...
, forming the
Metropolitan Atlanta Rapid Transit Authority
The Metropolitan Atlanta Rapid Transit Authority (MARTA, ) is the principal public transport operator in the Atlanta metropolitan area. Formed in 1971 as strictly a bus system, MARTA operates a network of bus routes linked to a rapid transit s ...
. The
Municipality of Metropolitan Seattle (Metro), the regional water quality agency, took over bus operations in
King County and the city of Seattle on January 1, 1973, after approval from voters in response to the failure of Forward Thrust.
The
Puget Sound Council of Governments, an inter-county planning agency, partnered with Metro to complete a
light rail corridor study in 1986. The regional transportation plan was amended the following year to include rail transit, and the
Washington State Legislature formed a State Rail Development Commission to study a regional transit system with light rail,
commuter rail
Commuter rail, or suburban rail, is a passenger rail transport service that primarily operates within a metropolitan area, connecting commuters to a central city from adjacent suburbs or commuter towns. Generally commuter rail systems are co ...
and express buses.
Establishment
The predecessor to Sound Transit was a 1995 ballot measure that was rejected by voters because of its $6.7 billion cost. The first Sound Transit ballot measure passed in 1996 as the current mix of buses, commuter rail and light rail, at a cost of $3.9 billion. By proposing a much smaller light rail system, the remaining funds could be used for the two other services, ensuring that the entire Seattle area received services from the measure.
Sound Transit started out in scandal. The agency faced a crisis of financial mismanagement and poor planning, and federal officials ordered an audit in 2000 and pulled promised funding. After a series of executives resigned in 2001, Joni Earl took the helm and is widely credited with saving the agency. Largely, this was by being more realistic and being more honest with the public — reportedly she used the slogan "Optimism is not our friend." Largely due to her efforts, by 2003 Sound Transit received a clean financial audit, and was re-rewarded the funding lost two years earlier. Despite this, the earlier crisis required Earl to drop about one-third of the originally promised light rail line.
Sound Transit 2
2007 vote
Sound Transit 2 (ST2) was part of a joint ballot measure with the Regional Transportation Investment District entitled
Roads and Transit, which was presented to Snohomish, King, and Pierce county voters on November 6, 2007. Sound Transit 2 would have made a number of mass transit related improvements, as well as a series of highway improvements. These changes included almost in new light rail lines, four new parking garages, two new Sounder stations, a
streetcar
A tram (called a streetcar or trolley in North America) is a rail vehicle that travels on tramway tracks on public urban streets; some include segments on segregated right-of-way. The tramlines or networks operated as public transport ...
line connecting
First Hill,
Capitol Hill, and the
International District, a transit center in
Bothell, and two expansion studies, one for studying rapid transit across the
SR-520 floating bridge and the other studying the use of the
Woodinville Subdivision
The Woodinville Subdivision is a railroad line that was formerly owned by BNSF Railway. It takes its name from one of its original end points in Woodinville, Washington, United States. The line extends approximately in east King County and Snohom ...
between
Renton and
Woodinville. The ballot measure was defeated by voters.
2008 vote
The Sound Transit Board on July 24, 2008 voted to put a reduced Sound Transit 2 plan before voters. It passed by large margins (58% to 42%) on November 4, 2008. The financial plan for the measure shows $17.8 billion expenditure over 15 years, funded with a 5-10% rise in the regional general sales tax, which essentially doubles Sound Transit's revenue. Light rail service will be extended from the currently funded northern terminus at Husky Stadium north to
Lynnwood. To the south, the tracks will continue from the current southern terminus at Sea-Tac Airport to the northern edge of
Federal Way. The proposed East Link Light Rail will depart from Downtown Seattle and end in Overlake via
Bellevue. A First Hill Connector (
streetcar
A tram (called a streetcar or trolley in North America) is a rail vehicle that travels on tramway tracks on public urban streets; some include segments on segregated right-of-way. The tramlines or networks operated as public transport ...
) was proposed from
Capitol Hill station to the Jackson Street terminus of the former
Waterfront Streetcar. In total, of new two-way light rail track were approved by this measure.
Sounder Commuter Rail will receive longer and more frequent trains, for a 30% increase in service. Express Bus service will be immediately boosted (17% increase in service; 25 additional buses) and
Washington State Route 520 will receive a
bus rapid transit
Bus rapid transit (BRT), also called a busway or transitway, is a bus-based public transport system designed to have much more capacity, reliability and other quality features than a conventional bus system. Typically, a BRT system includes ...
line. A new commuter rail line is proposed to run from North
Renton to
Snohomish if additional funding beyond the Sound Transit taxes is secured.
Sound Transit 3
Sound Transit 3 was a ballot measure that was approved by voters during the November 2016 elections in
King
King is the title given to a male monarch in a variety of contexts. The female equivalent is queen, which title is also given to the consort of a king.
*In the context of prehistory, antiquity and contemporary indigenous peoples, the ...
,
Pierce, and
Snohomish in
Washington. The $53.8 billion Sound Transit 3 plan will expand the existing
Link light rail system to the suburbs of
Tacoma,
Federal Way,
Everett and
Issaquah
Issaquah ( ) is a city in King County, Washington, United States. The population was 40,051 at the 2020 census. Located in a valley and bisected by Interstate 90, the city is bordered by the Sammamish Plateau to the north and the " Issaquah ...
, as well as the Seattle neighborhoods of
Ballard and
West Seattle. The local portion of the measure would be partially funded by increases in
sales tax, motor vehicle
excise tax
file:Lincoln Beer Stamp 1871.JPG, upright=1.2, 1871 U.S. Revenue stamp for 1/6 barrel of beer. Brewers would receive the stamp sheets, cut them into individual stamps, cancel them, and paste them over the Bunghole, bung of the beer barrel so when ...
, and
property tax.
The resulting transit network after the completion of Sound Transit 3 will include of additional
light rail serving 37 new stations; the entire, light rail system would carry an estimated 600,000 daily passengers. A
Sounder commuter rail extension to
DuPont and
bus rapid transit
Bus rapid transit (BRT), also called a busway or transitway, is a bus-based public transport system designed to have much more capacity, reliability and other quality features than a conventional bus system. Typically, a BRT system includes ...
lines on
State Route 522 and
Interstate 405 are also part of the package.
The package's projects would open in stages from 2024 to 2041.
Projects
University Link
The University Link tunnel is a light rail tunnel in Seattle, Washington. The twin-bore tunnel carries Link light rail service on the University Link Extension of Central Link (now the 1 Line), running from the Downtown Seattle Transit Tu ...
is a extension of the Central Link light rail line (now part of the 1 Line) which opened on March 19, 2016. Construction on the line began on March 6, 2009, and completed in early 2016. The line is underground for its entire route and connects downtown Seattle to the
University of Washington
The University of Washington (UW, simply Washington, or informally U-Dub) is a public research university in Seattle, Washington.
Founded in 1861, Washington is one of the oldest universities on the West Coast; it was established in Seat ...
via
Capitol Hill. The cost of the extension was about $1.9 billion with half of the funding coming from a grant from the
Federal Transit Administration.
The South 200th Link Extension is a extension of the Link Light Rail system. Construction on the line began in May 2013 and opened to the public September 24, 2016. The line is elevated for its entire route and connects
Seattle–Tacoma International Airport to the new
Angle Lake station and park-and-ride garage at South 200th Street in
SeaTac.
The
Northgate Link Extension was approved in the 2008 ballot measure, began construction in 2012, and was opened on October 2, 2021. It extended light rail service from the University of Washington to
Northgate station, with two intermediate stops along a mostly-tunneled route in north Seattle.
Under construction
The Hilltop Expansion Project is under construction to extend the current T Line from the Theater District Station to
St. Joseph Hospital, via
Wright Park Wright Park may refer to:
* Wright Park (Baguio)
* Wright Park (Tacoma, Washington)
Wright Park is a arboretum and public park located in Tacoma, Washington, that is managed by Metro Parks Tacoma. The park was designed by Bavarian landscape ...
and
Tacoma General Hospital along Stadium Way, Division Street, and Martin Luther King Jr Way. It is planned to open in 2022.
The
2 Line, also known as the
East Link Extension, will connect Seattle to
Bellevue and
Redmond using the
Interstate 90 floating bridge. It would terminate at the
Microsoft Redmond campus in Redmond's Overlake area. Construction began in 2016 and is expected to open in 2024. A further extension of the 2 Line to
Downtown Redmond is planned to open in 2024.
The
Lynnwood Link Extension will further extend Lines 1 and 2 from Northgate to
Lynnwood, via stations at NE 145th Street, NE 185th Street, and
Mountlake Terrace. Despite concerns that President Trump's proposed budget could cut federal funding for the project, in Fiscal Year 2017, Sound Transit received $100 million of the requested $1.2 billion in federal funding. This funding was followed up in Fiscal Year 2018 with another $100 million. At the end of Fiscal Year 2018, the full $1.2 billion grant, as well as $650 million in low-interest loans were approved by Congress, fully securing the requested federal funding.
The
Federal Way Link Extension
The Federal Way Link Extension is a planned Link light rail extension of the 1 Line that will travel south from Sea-Tac Airport to Federal Way, along the west side of Interstate 5. It was approved in 2008, but scaled back in 2010 to term ...
is planned to extend the 1 Line from Angle Lake station to Redondo/Star Lake, in a plan approved by the region's voters in November 2008. Construction on the project began in 2020 and it will add of track with stations at
Highline Community College, the
Star Lake Park & Ride, and
Federal Way Transit Center, primarily following Interstate 5.
Funded projects
Under Sound Transit 3, which was approved in 2016, Sound Transit services will expand with $54 billion in funding (combining local taxes and federal grants) over a 25-year period generally beginning with the completion of Sound Transit 2. The measure will add of light rail, with the completed system carrying an estimated 500,000 riders per day.
The plan also funds Sound Transit Express bus routes, adds three bus rapid transit lines and expands Sounder commuter rail with longer trains, potentially better frequency and two additional stations in
Tillicum (near
Joint Base Lewis–McChord) and
DuPont.
See also
*
List of rapid transit systems
*
List of rail transit systems in the United States
This is a list of the operating passenger rail transit systems in the United States. This list does not include intercity rail services such as the Alaska Railroad or Amtrak and its state-sponsored subsidiaries. "Region" refers to the metropolit ...
Notes
External links
*
{{Puget Sound Transit
Government agencies established in 1993
1993 establishments in Washington (state)
Intermodal transportation authorities in Washington (state)
Bus transportation in Washington (state)
Transit authorities with natural gas buses
Transportation in King County, Washington
Transportation in Snohomish County, Washington
Transportation in Pierce County, Washington