Transportation in Seattle
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Transportation in Seattle is largely focused on the
automobile A car or automobile is a motor vehicle with wheels. Most definitions of ''cars'' say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people instead of goods. The year 1886 is regarde ...
like many other cities in western North America; however, the city is just old enough for its layout to reflect the age when
railway Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a pre ...
s and trolleys predominated. These older modes of transportation were made for a relatively well-defined downtown area and strong neighborhoods at the end of several former streetcar lines, now mostly bus lines. Due to Seattle's
isthmus An isthmus (; ; ) is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. A tombolo is an isthmus that consists of a spit or bar, and a strait is the sea counterpart of an isthmus ...
-like geography and the concentration of jobs within the city, much of the flow of transportation in the metropolitan area is through the city proper. North-south transportation is highly dependent on the
Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
corridor, which connects the Puget Sound area with southwest Washington cities and the
Portland metropolitan area The Portland metropolitan area is a metro area in the U.S. states of Oregon and Washington centered on the principal city of Portland, Oregon. The U.S. Office of Management and Budget (OMB) identifies it as the Portland–Vancouver–Hillsboro, ...
, as well as cities to the north such as Bellingham and
Vancouver Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the ...
,
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
. I-5 continues as
British Columbia Highway 99 Highway 99 is a provincial highway in British Columbia that serves Greater Vancouver and the Squamish–Lillooet corridor over a length of . It is a major north–south artery within Vancouver and connects the city to several suburbs as well ...
at the U.S.-
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
border's
Peace Arch The Peace Arch (french: Arche de la Paix) is a monument situated near the westernmost point of the Canada–United States border in the contiguous United States, between the communities of Blaine, Washington and Surrey, British Columbia. Co ...
crossing, between Blaine and Surrey. State Route 99 is also a major arterial in the western half of the city; it included the now-defunct
Alaskan Way Viaduct The Alaskan Way Viaduct ("the viaduct" for short) was an elevated freeway in Seattle, Washington, United States, that carried a section of State Route 99 (SR 99). The double-decked freeway ran north–south along the city's waterfront for ...
along the Seattle waterfront. The
Alaskan Way Viaduct replacement tunnel The State Route 99 tunnel, also known as the Alaskan Way Viaduct replacement tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States. The , double-decker tunnel carries a section of State Route 99 (SR 99) under ...
was opened in place of the elevated viaduct in February 2019 on account of seismic instability. Transportation to and from the east is via State Route 520's Evergreen Point Floating Bridge and Interstate 90's Lacey V. Murrow Memorial Bridge and Third Lake Washington Bridge, all over Lake Washington. Those bridges are respectively the first, second, and fifth longest floating bridges in the world. State Route 522 connects Seattle to its northeastern suburbs. Two
public transportation 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, typical ...
agencies serve Seattle:
King County Metro King County Metro, officially the King County Metro Transit Department and often shortened to Metro, is the public transit authority of King County, Washington, which includes the city of Seattle. It is the eighth-largest transit bus agency in t ...
, which operates local and commuter buses within King County, and
Sound Transit Sound Transit (ST), officially the Central Puget Sound Regional Transit Authority, is a public transit agency serving the Seattle metropolitan area in the U.S. state of Washington. It operates the Link light rail system in Seattle and Tacoma, ...
, which operates
commuter rail Commuter rail, or suburban rail, is a passenger rail transport service that primarily operates within a metropolitan area, connecting Commuting, commuters to a Downtown, central city from adjacent suburbs or commuter towns. Generally commuter r ...
, light rail, and regional express buses within the greater
Puget Sound region The Puget Sound region is a coastal area of the Pacific Northwest in the U.S. state of Washington, including Puget Sound, the Puget Sound lowlands, and the surrounding region roughly west of the Cascade Range and east of the Olympic Mountains. ...
. In recent years, as Seattle's population and employment have surged, transit has played an increasingly important role in transportation within the metro area. By 2017, nearly 50% of commuters to downtown Seattle arrived via mass transit. Unlike most North American cities, water transportation remains important.
Washington State Ferries Washington State Ferries (WSF) is a government agency that operates automobile and passenger ferry service in the U.S. state of Washington as part of the Washington State Department of Transportation. It runs ten routes serving 20 terminals loc ...
, the largest ferry system in the United States and the second largest in the world, operates a passenger-only ferry from
Colman Dock Colman Dock, also called Pier 52, is the primary ferry terminal in Seattle, Washington, United States. The original pier is no longer in existence, but the terminal, now used by the Washington State Ferry system, is still called "Colman Dock". ...
in Downtown to
Vashon Island Vashon is a census-designated place (CDP) in King County, Washington, United States. It covers an island alternately called Vashon Island or Vashon–Maury Island, the largest island in Puget Sound south of Admiralty Inlet. The population was 10, ...
, car ferries from Colman Dock to
Bainbridge Island Bainbridge Island is a city and island in Kitsap County, Washington. It is located in Puget Sound. The population was 23,025 at the 2010 census and an estimated 25,298 in 2019, making Bainbridge Island the second largest city in Kitsap County. ...
and to
Bremerton Bremerton is a city in Kitsap County, Washington. The population was 37,729 at the 2010 census and an estimated 41,405 in 2019, making it the largest city on the Kitsap Peninsula. Bremerton is home to Puget Sound Naval Shipyard and the Bremer ...
, and a car ferry from
West Seattle West Seattle is a conglomeration of neighborhoods in Seattle, Washington, United States. It comprises two of the thirteen districts, Delridge and Southwest, and encompasses all of Seattle west of the Duwamish River. It was incorporated as an i ...
to Vashon Island to Southworth. Seattle was once home to the '' Kalakala'', a streamlined
art deco Art Deco, short for the French ''Arts Décoratifs'', and sometimes just called Deco, is a style of visual arts, architecture, and product design, that first appeared in France in the 1910s (just before World War I), and flourished in the Unite ...
-style ferry that sailed from the 1930s to the 1960s. Seattle contains most of
Boeing Field Boeing Field, officially King County International Airport , is a public airport owned and operated by King County, five miles south of downtown Seattle, Washington. The airport is sometimes referred to as KCIA (King County International Airp ...
, officially named King County International Airport; but most airline passengers use Seattle-Tacoma International Airport in the city of SeaTac. Seattle is also served by three
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 ...
routes from the
King Street Station King Street Station is a train station in Seattle, Washington, United States. It is served by Amtrak's '' Cascades'', ''Coast Starlight'', and ''Empire Builder'', as well as Sounder commuter trains run by Sound Transit. The station also anchor ...
: the Cascades,
Coast Starlight The ''Coast Starlight'' is a passenger train operated by Amtrak on the West Coast of the United States between Seattle and Los Angeles via Portland and the San Francisco Bay Area. The train, which has operated continuously since Amtrak's format ...
, and
Empire Builder The ''Empire Builder'' is an Amtrak long-distance passenger train that operates daily between Chicago and either Seattle or Portland via two sections west of Spokane. Introduced in 1929, it was the flagship passenger train of the Great Northe ...
lines.


History

Even though Seattle is old enough that railways and streetcars once dominated its transportation system, the city is now largely dominated by automobiles but has recently started rebuilding
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 a ...
lines and light rail routes. Seattle is also serviced by an extensive network of bus routes and two commuter rail routes connecting it to many of its suburbs. Organized land transportation in Seattle dates back at least to 1871; by that date, a wagon traveled twice daily from what is now First Avenue (near Elliott Bay) to Lake Washington; the fare was 50 cents, no small sum for that era. In 1880 a two-horse carriage carried passengers and freight from roughly today's Pioneer Square to Belltown every two hours at a fare of 12.5 cents in an open coach or 15 cents in a covered coach. This was shortly followed by similar services connecting out to Lake Union and Madison Park on Lake Washington. Water transport was important even within what are now city limits. A steamer connected South Lake Union to Latona (between today's Lower Wallingford and the University District) and another steamer crossed Green Lake. The first street railway,
Seattle Street Railway The Seattle Municipal Street Railway was a city-owned streetcar network that served the city of Seattle, Washington and its suburban neighborhoods from 1919 to 1941. It was a successor to the horse-drawn Seattle Street Railway established in 1884 ...
, came in 1884, with horse-drawn cars plying of track up today's Second Avenue to Pine Street, then up First Avenue to Battery Street. Yesler Way and Jackson Street got their cable cars (from Pioneer Square to Lake Washington) in 1888, allowing public transportation on routes over hills too steep for horses. Electric streetcars appeared in 1889, making Seattle one of the first cities in the United States to adopt this innovation. The
Great Seattle Fire The Great Seattle Fire was a fire that destroyed the entire central business district of Seattle, Washington on June 6, 1889. The conflagration lasted for less than a day, burning through the afternoon and into the night, and during the same sum ...
did not slow this progress at all: by 1890, there were lines along the waterfront from South Seattle (today's South Park) to Lower Queen Anne and from the center of town to Capitol Hill, Madison Park, and Madrona. These were instrumental in the creation of a relatively well-defined downtown and strong neighborhoods at the end of their lines. At the turn of the century, the streets were so bad that a boy named Joseph Bufonchio drowned in a sink-hole at the corner of Third and Jackson. As Gordon Newell noted in 1956, contemporary reports did not seem to consider this particularly unusual. At that time, there were about 25 independent transit lines in Seattle. By 1907, the Seattle Electric Company, owned by
Boston Boston (), officially the City of Boston, is the state capital and most populous city of the Commonwealth of Massachusetts, as well as the cultural and financial center of the New England region of the United States. It is the 24th- mo ...
-based Stone & Webster, leveraged its foothold in the electric power industry to consolidate these into one operation, known after 1912 as the Puget Sound Traction, Light and Power Company. It cost a
nickel Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive but large pieces are slow ...
to ride. Puget Sound Traction was bought out by the city in 1919 for US$15 million. However, under the city's management, the streetcars chronically ran a loss (even after a 1923 fare increase to three rides for a quarter, a fare of 8-and-a-third cents), and the quality of the system deteriorated. The advent of the automobile sounded the death knell for rail in Seattle. Tacoma–Seattle railway service ended in 1929 and the Everett–Seattle service came to an end in 1939, replaced by automobiles running on the recently developed highway system. When the city received a US$10.2 million federal grant to pay off transit-related debts and modernize its transit system, rails on city streets were paved over or removed, and the opening in 1940 of the Seattle trolleybus system brought the end of streetcar service in Seattle in the early hours of April 12, 1941. This left an extensive network of buses (including of
trolleybus A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tramin the 1910s and 1920sJoyce, J.; King, J. S.; and Newman, A. G. (1986). ''British Trolleybus Systems'', pp. 9, 12. London: Ian Allan Publishing. .or trol ...
lines) under an independent Municipal Transportation Commission as the only mass transit within the city and throughout the region. The new transit system was jammed and profitable during the gasoline and rubber
rationing Rationing is the controlled distribution of scarce resources, goods, services, or an artificial restriction of demand. Rationing controls the size of the ration, which is one's allowed portion of the resources being distributed on a particular ...
of
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
, but the automobile reigned supreme after the war. Fares rose to 10 cents, the first of many increases that would lead to a present-day regular adult fare of $2.75.


Streets, roads, and automobiles

Seattle set its first
speed limit Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed - expre ...
in the 1880s, in the days of horse-drawn vehicles. At that time, traffic in the Pioneer Square neighborhood was limited to . The city is described in a mid-20th-century
civics Civics is the study of the rights and obligations of citizens in society. The term derives from the Latin word ''civicus'', meaning "relating to a citizen". The term relates to behavior affecting other citizens, particularly in the context of ur ...
textbook as "a city of islands—islands created both by water and by abrupt valleys that can be traversed only by bridges." Already by 1948, 221,500 vehicles a day crossed the city's bridges across the Lake Washington Ship Canal and Duwamish River; except for the high Aurora Bridge (officially George Washington Memorial Bridge) across the Ship Canal, these were all drawbridges. This was before the construction of the Interstate Highways or State Route 520; the original Lake Washington Floating Bridge (opened 1940) provided the only road out of town to the east; construction of the Alaskan Way Viaduct, the first limited-access highway through the city center, was still underway. Even with the lesser population of that time and fewer major highways, difficulty parking downtown had already become "practically an institution". The total number of vehicles parking downtown in a day would already have filled a parking lot the size of downtown had they all been there at once; naturally, many of these were there only briefly for shopping. Parking meters had been introduced in the early 1940s, and multi-level parking garages provided some relief (and would later provide more), but the impact of the automobile on the city was very apparent. The city was considering various proposals, such as the establishment of large parking lots on the periphery of downtown with shuttle buses into the center. The city was seeking (and failing to get) state permission to use the right of
eminent domain Eminent domain (United States, Philippines), land acquisition (India, Malaysia, Singapore), compulsory purchase/acquisition (Australia, New Zealand, Ireland, United Kingdom), resumption (Hong Kong, Uganda), resumption/compulsory acquisition (Austr ...
to acquire property for multi-level parking lots. Later, in the mid-1960s, the historic Seattle Hotel building was torn down for just this purpose; the reaction against that sparked the preservationist movement for the revival of Pioneer Square and made it clear that the city would not solve its problem by demolishing a ring around downtown. Over 15,000 Seattleites are members of the
car sharing Carsharing or car sharing (AU, NZ, CA, TH, & US) or car clubs (UK) is a model of car rental where people rent cars for short periods of time, often by the hour. It differs from traditional car rental in that the owners of the cars are often pri ...
program Zipcar (formerly Flexcar). While not all members are frequent users, the use of these shared cars has been substantial enough to justify the purchase of over 150 cars and other light vehicles for the program, with an additional vehicle purchased approximately every ten days. Two other car-sharing services, Car2Go and ReachNow, operate within Seattle.


SR 99 Tunnel

The SR 99 Tunnel is a bored double-decker highway tunnel carrying a section of State Route 99 (SR 99) under Downtown Seattle from
SoDo Sodo ( am, ሶዶ) or Wolaita Sodo ( am, ወላይታ ሶዶ) or ( Wolaytatto: ''Wolayta Sodo Ambbaa'') is a city in south-central Ethiopia. The administrative center of the Wolaita Zone. It has a latitude and longitude of with an elevation bet ...
in the south to South Lake Union in the north. Since the 2001 Nisqually earthquake, the replacement of the
Alaskan Way Viaduct The Alaskan Way Viaduct ("the viaduct" for short) was an elevated freeway in Seattle, Washington, United States, that carried a section of State Route 99 (SR 99). The double-decked freeway ran north–south along the city's waterfront for ...
has been the source of much political controversy demonstrating the
Seattle process The ''Seattle process'' or ''Seattle way'' is a term stemming from the political procedure in Seattle and King County, and to a lesser extent other cities and the Washington state government. The term has no strict definition but refers to the perv ...
. Options for replacing the viaduct, which carried 110,000 vehicles per day, included either replacing it with a
cut-and-cover A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube cons ...
tunnel, replacing it with another elevated highway, or eliminating it while modifying other surface streets and public transportation. The current plan emerged in 2009 when government officials agreed to a deep-bore tunnel. Construction began in July 2013 using "
Bertha Bertha is a female Germanic name, from Old High German ''berhta'' meaning "bright one". It was usually a short form of Anglo Saxon names ''Beorhtgifu'' meaning "bright gift" or ''Beorhtwynn'' meaning "bright joy". The name occurs as a theonym, s ...
", at the time the world's largest-diameter
tunnel boring machine A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They may also be used for microtunneling. They can be designed to bore thro ...
. After several delays, tunnel boring was completed in April 2017, and the tunnel opened to traffic on February 4, 2019.


Freeways in the metropolitan region

There are 21 different
freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...
s and highways that make up the Seattle freeway system. They are:
Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
, Interstate 405, Interstate 90, Interstate 705,
US 2 U.S. Route 2 or U.S. Highway 2 (US 2) is an east–west U.S. Highway spanning across the northern continental United States. US 2 consists of two segments connected by various roadways in southern Canada. Unlike some routes, whi ...
, SR 3, SR 16, SR 18, the
Alaskan Way Viaduct The Alaskan Way Viaduct ("the viaduct" for short) was an elevated freeway in Seattle, Washington, United States, that carried a section of State Route 99 (SR 99). The double-decked freeway ran north–south along the city's waterfront for ...
/SR 99, SR 167, SR 303/Waaga Way, SR 410, SR 509, SR 512, SR 518, SR 520, SR 525, SR 526, SR 599, the Port of Seattle owned Airport Expressway, and the City of Seattle owned West Seattle Freeway. Interstate 5 is the major north–south route through the region. Interstate 5 is four or five lanes for most of its way through the metro area. The freeway connects the metro area to California, Oregon, and British Columbia. The freeway system uses ramp meters to help keep traffic moving.
WSDOT The Washington State Department of Transportation (WSDOT or WashDOT, both ) is a governmental agency that constructs, maintains, and regulates the use of transportation infrastructure in the U.S. state of Washington (state), Washington. Establi ...
uses
variable message signs A variable- (also changeable-, electronic-, or dynamic-) message sign, often abbreviated VMS, CMS, or DMS, and in the UK known as a matrix sign, is an electronic traffic sign often used on roadways to give travelers information about special ...
to let travelers know if there is an accident, to tell drivers how long their drive will be to certain areas, and for Amber Alerts. Recently, WSDOT installed variable speed signs along SR 520 and I-90 between I-5 and I-405, and along I-5 between the West Seattle Freeway and SR 520. There are also HOV lanes to move
bus A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for cha ...
es and carpools faster on many freeways and arterials. The HOV lanes on I-405 allow general purpose traffic to use them after 7pm (till about 5am), and the lanes on SR 167 are actually HOT lanes (carpools may use the lanes free; solo drivers can use the lanes for a variable fee). There are 225 lane miles of HOV lanes built and another 100 unbuilt. Freeway improvements are paid for by two gas taxes, 2003 Gas Tax and 2005 Gas Tax.


Interstate 5

This is Seattle's largest and widest freeway. Traffic back-ups going into Seattle from the north and south are very common during the morning and evening rush hours.
Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
runs just east of
Downtown Tacoma Downtown is the central business district of Tacoma, Washington, United States, located in the inner Northeast section of the city. It is approximately bounded east-west by A Street and Tacoma Avenue, and north-south by South 7th Street and South ...
as it goes through the metro area. After going through Federal Way and the west side of
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...
it passes by a major shopping mall, Southcenter in Tukwila, where it connects with the south terminus of Interstate 405. Then the freeway continues and passes by SeaTac International Airport in the inner southern suburbs of Seattle and passes very close to Boeing Field (also known as King County International Airport). As the freeway heads towards Downtown Seattle,
reversible lane A reversible lane (British English: tidal flow) is a lane in which traffic may travel in either direction, depending on certain conditions. Typically, it is meant to improve traffic flow during rush hours, by having overhead traffic lights and li ...
s, or express lanes, branch off the mainline and continue north through the city. The express lanes carry southbound traffic in the morning and northbound traffic in the afternoon. The Express Lanes merge with the main line in the Northgate area of North Seattle. After that, I-5 continues north through the cities of
Shoreline A shore or a shoreline is the fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. In physical oceanography, a shore is the wider fringe that is geologically modified by the action of the body of water past a ...
, Mountlake Terrace, and
Lynnwood Lynnwood is a city in Snohomish County, Washington, United States. The city is part of the Seattle metropolitan area and is located north of Seattle and south of Everett, near the junction of Interstate 5 and Interstate 405. It is the four ...
. In Lynnwood it merges with Interstate 405 again. It continues north to the last large city in Seattle Metro area, Everett. It was built in South Tacoma between 1955 and 1957, North Tacoma to Kent between 1959 and 1961, between Kent and downtown Seattle in 1966, from downtown Seattle to Roanoke Street in 1964, from Roanoke Street to Lake City Way/ SR 522 in 1960, and north of there to Everett in 1964.


Interstate 90

Interstate 90 goes east out of Seattle, eventually terminating in
Boston Boston (), officially the City of Boston, is the state capital and most populous city of the Commonwealth of Massachusetts, as well as the cultural and financial center of the New England region of the United States. It is the 24th- mo ...
. The freeway was originally built in 1940 from Rainier Avenue to
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 Al ...
. It passes through the Eastside's largest city,
Bellevue Bellevue means "beautiful view" in French. It may refer to: Placenames Australia * Bellevue, Western Australia * Bellevue Hill, New South Wales * Bellevue, Queensland * Bellevue, Glebe, an historic house in Sydney, New South Wales Canada ...
, and skirts the north side of
Factoria Mall Factoria is a mixed-use suburban neighborhood in south Bellevue, Washington and is one of the city's significant commercial districts. Originally timberland from the 1890s to 1920s and later envisioned as an industrial center, Factoria has since ...
in Bellevue, where it interchanges with the north–south Interstate 405. Then the freeway continues east and passes through
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 Al ...
, Snoqualmie, and North Bend before climbing into the
Cascade Mountains The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, a ...
. The freeway originally consisted of four lanes, and crossed the Lacey V. Murrow Floating Bridge. In the early 1950s, an interchange was built at Rainier Avenue and the highway extended 1 mile closer to Seattle's city centre along "Corwin Place". In the early 1960s, traffic congestion forced the Department of Highways to institute a tidal flow system, in which three lanes, controlled by overhead signals went into Seattle in the morning, and toward Bellevue in the afternoon. In 1968, improvements to the east of
Mercer Island Mercer Island is a city in King County, Washington, United States, located on an island of the same name in the southern portion of Lake Washington. Mercer Island is in the Seattle metropolitan area, with Seattle to its west and Bellevue to it ...
were made; the highway was widened to up to 6 lanes in each direction and the interchange with I-405 was upgraded from a cloverleaf to a fully directional interchange. Litigation kept the 7-mile section between Bellevue and
Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
from being upgraded until the 1980s, at which time a new bridge from the Eastside to
Mercer Island Mercer Island is a city in King County, Washington, United States, located on an island of the same name in the southern portion of Lake Washington. Mercer Island is in the Seattle metropolitan area, with Seattle to its west and Bellevue to it ...
was built and the dangerous "bulge" was removed from the Lacey V. Murrow Floating Bridge. In 1990, the renovations/widening of the freeway were completed, including the new Homer M. Hadley Memorial Bridge over Lake Washington to carry westbound traffic and the HOV/
reversible lane A reversible lane (British English: tidal flow) is a lane in which traffic may travel in either direction, depending on certain conditions. Typically, it is meant to improve traffic flow during rush hours, by having overhead traffic lights and li ...
s, or express lanes, from Bellevue to Seattle, with general-purpose traffic allowed to use the reversible lanes in between
Mercer Island Mercer Island is a city in King County, Washington, United States, located on an island of the same name in the southern portion of Lake Washington. Mercer Island is in the Seattle metropolitan area, with Seattle to its west and Bellevue to it ...
and Seattle. The express lanes carry westbound traffic in the morning and eastbound traffic in the afternoon. Further improvements are now being made to put HOV lanes in both outer roadways to ready the center roadway for Sound Transit's
Link light rail Link light rail is a light rail rapid transit system serving the Seattle metropolitan area in the U.S. state of Washington. It is managed by Sound Transit in partnership with local transit providers, and consists of two non-connected lines: ...
.


Interstate 405

Interstate 405 begins in Tukwila at I-5, SR 518, and Westfield Southcenter, and continues east through Renton and then turns north and runs through Bellevue, Kirkland, and Bothell, before turning northwest and crossing I-5 in Lynnwood (near
Alderwood Mall Alderwood, formerly Alderwood Mall, is a regional shopping mall in Lynnwood, Washington. It is anchored by JCPenney, Macy's and Nordstrom and comprises both a traditional enclosed mall and two open-air areas known as The Village and The Terraces. ...
), where it becomes SR 525, a freeway for its first few miles. I-405 was built in stages between 1955 and 1968, with a major upgrade north of Bellevue to
Bothell Bothell () is a city in King and Snohomish counties in the U.S. state of Washington. It is part of the Seattle metropolitan area, situated near the northeast end of Lake Washington. As of the 2020 census, it had a population of 48,161 resident ...
in 1972. HOV lanes were added in the 1980s and 1990s, the interchange between I-405 and SR 520 was upgraded in the early 1990s, and new ramps have been added in downtown Bellevue in recent years to supplement the original interchange at NE 8th Street.


SR 520

SR 520 begins in Seattle at I-5 and continues east across Lake Washington on the Evergreen Point Bridge through Bellevue, interchanges with I-405, then turns northeast, passes the main
Microsoft Microsoft Corporation is an American multinational technology corporation producing computer software, consumer electronics, personal computers, and related services headquartered at the Microsoft Redmond campus located in Redmond, Washin ...
campus (which funded an overpass at NE 36th St and an interchange at NE 40th to supplement the existing interchange at NE 51st St), and terminates in Redmond at SR 202. The section between I-5 and Bellevue Way was opened in 1963, with the interchange at I-405 built in 1966. It was further extended to it current terminus between 1973 and 1982. The Washington State Department of Transportation is currently widening the freeway on the Eastside, modifying interchanges, and moving the HOV lanes to the inside of the roadway.


SR 167

SR 167, also known as the Valley Freeway, begins in Renton at I-405 and continues south through
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...
, Auburn, where it interchanges with SR 410, Pacific, and Algona, then interchanges with SR 410, and currently terminates at SR 161. The Valley Freeway was built in stages between 1964 and 1977, with a major upgrade of its southern end in 1986. The Washington State Department of Transportation is currently planning to extend the freeway to Tacoma. SR 167 has HOV lanes between I-405 and SR 18 which also allow single-passenger vehicles to use them for a variable fee, also known as HOT lanes.


SR 99/SR 599

SR 99/ SR 599, parts of which are also known as West Marginal Way, begins in Tukwila at I-5 and continues north to the
First Avenue South Bridge The First Avenue South Bridge is a pair of double-leaf bascule bridges built between 1956 and 1998 that carry State Route 99 over the Duwamish River about three miles (5 km) south of downtown Seattle, Washington Washington commonly refers ...
, where it interchanges with SR 509, then continues as a surface street (East Marginal Way) for a few miles, then, adjacent to CenturyLink Field, becomes the SR 99 Tunnel. This tunnel passes under downtown Seattle and emerges in South Lake Union as Aurora Avenue, a divided expressway (partial control of access with interchanges) until Green Lake, where it becomes a surface street again. SR 599 was built in 1968, the freeway portion of SR 99 was built in 1956 as was the
First Avenue South Bridge The First Avenue South Bridge is a pair of double-leaf bascule bridges built between 1956 and 1998 that carry State Route 99 over the Duwamish River about three miles (5 km) south of downtown Seattle, Washington Washington commonly refers ...
(a second structure was built next to the first in the early 1990s), and the Alaskan Way Viaduct was open in 1952, with an extension open in 1959, until its closure and demolition in 2019. North of that, Aurora Avenue was built in 1932, including the cantilever/truss George Washington Memorial Bridge.


West Seattle Freeway

The West Seattle Freeway begins in
Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest regio ...
at I-5 and continues west, where it interchanges with SR 99 and terminates at a signal at Fauntleroy Way SW and 35th Avenue SW. The West Seattle Freeway was built in 1941, and the high-level bridge opened in 1984 and the roadway was widened in 2012 between I-5 and SR 99.


Other freeways

Most of the other freeways in the Seattle area are two lanes in each direction and generally travel in a north–south direction, with the exceptions of
US 2 U.S. Route 2 or U.S. Highway 2 (US 2) is an east–west U.S. Highway spanning across the northern continental United States. US 2 consists of two segments connected by various roadways in southern Canada. Unlike some routes, whi ...
, SR 410, SR 512, SR 518, SR 526, and Waaga Way. SR 16 is signed east–west but it travels mostly north–south.


Mass transit

Two
public transportation 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, typical ...
agencies serve the city of Seattle: King County Metro Transit and
Sound Transit Sound Transit (ST), officially the Central Puget Sound Regional Transit Authority, is a public transit agency serving the Seattle metropolitan area in the U.S. state of Washington. It operates the Link light rail system in Seattle and Tacoma, ...
. Snohomish County's
Community Transit Community Transit (CT) is the public transit authority of Snohomish County, Washington, United States, excluding the city of Everett, in the Seattle metropolitan area. It operates local bus, paratransit and vanpool service within Snohomish C ...
also runs bus routes to Downtown Seattle and 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 Seattl ...
. Sound Transit is the regional transit authority, commissioned by voters in 1996 to build a system of light rail, express buses, and
commuter rail Commuter rail, or suburban rail, is a passenger rail transport service that primarily operates within a metropolitan area, connecting Commuting, commuters to a Downtown, central city from adjacent suburbs or commuter towns. Generally commuter r ...
within the Central Puget Sound area. The agency provides a number of regional
express bus Public transport bus services are generally based on regular operation of transit buses along a route calling at agreed bus stops according to a published public transport timetable. History of buses Origins While there are indications ...
routes connecting Seattle with neighboring suburbs and cities. Metro Transit's system includes a network of trolleybus routes The
Sounder commuter rail Sounder commuter rail is a commuter rail service operated by BNSF on behalf of Sound Transit. Service operates Monday through Friday during peak hours from Seattle, Washington, north to Everett and south to Lakewood. In , the system had a ride ...
system consists of two lines, linking Seattle with Lakewood along its Southern run and Seattle with Everett along its Northern run. Several stations in intermediate cities along the lines are also served. The light rail system, called
Link light rail Link light rail is a light rail rapid transit system serving the Seattle metropolitan area in the U.S. state of Washington. It is managed by Sound Transit in partnership with local transit providers, and consists of two non-connected lines: ...
, includes the initial from downtown Seattle to Sea-Tac Airport, which began service in 2009. Extension to the University of Washington via the University Link tunnel and Angle Lake station began service in 2016; they were followed by the Northgate Link Extension in 2021. It was named the 1 Line and will be joined by other lines in future extensions approved by voters in 2008 and 2016. Further light rail extensions are planned to connect to
Lynnwood Lynnwood is a city in Snohomish County, Washington, United States. The city is part of the Seattle metropolitan area and is located north of Seattle and south of Everett, near the junction of Interstate 5 and Interstate 405. It is the four ...
and other areas to the north; east across Lake Washington to
Bellevue Bellevue means "beautiful view" in French. It may refer to: Placenames Australia * Bellevue, Western Australia * Bellevue Hill, New South Wales * Bellevue, Queensland * Bellevue, Glebe, an historic house in Sydney, New South Wales Canada ...
and Redmond; and south to Federal Way. The
Sound Transit 3 Sound Transit 3, abbreviated as ST3, was a ballot measure during the November 2016 elections in Seattle, Washington, proposing an expansion of the regional public transit system. The measure was proposed by Sound Transit, which was established ...
ballot measure, passed in 2016, will further expand the system both regionally and within the city, with service to Tacoma, Everett,
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 Al ...
, south Kirkland, and to the neighborhoods Ballard and
West Seattle West Seattle is a conglomeration of neighborhoods in Seattle, Washington, United States. It comprises two of the thirteen districts, Delridge and Southwest, and encompasses all of Seattle west of the Duwamish River. It was incorporated as an i ...
. The
Downtown Seattle Transit Tunnel The Downtown Seattle Transit Tunnel (DSTT), also referred to as the Metro Bus Tunnel, is a pair of public transit tunnels in Seattle, Washington, United States. The double-track tunnel and its four stations serve Link light rail trains on th ...
is a 1.3-mile tunnel under downtown built in 1987 and opened in 1990, to relieve bus congestion along surface streets. Originally served by
dual-mode bus A dual-mode bus is a bus that can run independently on power from two different sources, typically electricity from overhead lines like a trolleybus or from batteries like a hybrid bus, alternated with conventional fossil fuel (generally diesel ...
es that operated electrically within it, the tunnel was retrofitted from 2005 to 2007 to accommodate light rail, and in 2009, Link light rail trains began serving tunnel stations as part of the initial Central Link segment. All tunnel bus routes were rerouted to surface streets in 2019 to make way for the demolition of
Convention Place Station Convention Place was a bus station in Seattle, Washington, United States. It served as the northern terminus of the Downtown Seattle Transit Tunnel and was used by King County Metro and Sound Transit Express buses. Link light rail, which stops ...
, making the tunnel an exclusive subway for Link trains within the city core. Above the tunnel, 3rd Avenue through downtown serves as a major bus arterial, with access restricted to buses only during peak commuting hours. The city is currently in the process of expanding a modern
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 a ...
network. In December 2007, the city inaugurated its
South Lake Union Streetcar The South Lake Union Streetcar, officially the South Lake Union Line, is a streetcar route in Seattle, Washington, United States, forming part of the Seattle Streetcar system. It travels and connects Downtown Seattle to the South Lake Union n ...
line between
Westlake Center Westlake Center is a four-story shopping center and 25-story office tower in downtown Seattle, Washington, United States. The southern terminus of the Seattle Center Monorail, it is located across Pine Street from Westlake Park, between 4th and ...
and stops in the South Lake Union neighborhood. In 2009, the Seattle city council approved a second line, the First Hill Streetcar, to connect First Hill to Link light rail at Capitol Hill and International District/Chinatown stations. The line began service in 2016 after two years of delays. Metro Transit also operated a historic
Waterfront Streetcar The Waterfront Streetcar, officially the George Benson Waterfront Streetcar Line, was a heritage streetcar line run by King County Metro in Seattle, Washington, United States. It traveled for along Alaskan Way on the city's waterfront facing ...
line that ran along Alaskan Way, but the streetcar's maintenance barn was demolished to make room for the
Olympic Sculpture Park The Olympic Sculpture Park, created and operated by the Seattle Art Museum (SAM), is a public park with modern and contemporary sculpture in downtown Seattle, Washington. The park, which opened January 20, 2007, consists of a outdoor sculpture mu ...
, resulting in the subsequent closure of the line. King County Metro now operates a replacement bus line that mirrors the route. The proposed City Center Connector project would connect the South Lake Union and First Hill streetcars into a single line with a routing along 1st Avenue in Downtown Seattle. In 2009, the
ORCA Card The ORCA card (standing for One Regional Card for All) is a contactless, stored-value smart card system for public transit in the Puget Sound region of Washington, United States. The card is valid on most transit systems in the Seattle metropo ...
was introduced as a new way for fare payment between the seven transit agencies in the Puget Sound region. The card uses RFID technology to handle payment from either passes, vouchers, or the E-purse, a stored value debit account. ORCA's precursor, PugetPass, will be retained as one of the several passes that can be loaded automatically onto the card. The system also calculates transfers for a two-hour window for those paying with the E-purse. Since 2022, all transit agencies in the Puget Sound area have waived fares for passengers under the age of 18 as part of a statewide program. The
Seattle Center Monorail The Seattle Center Monorail is an elevated straddle-beam monorail line in Seattle, Washington, United States. The monorail runs along 5th Avenue between Seattle Center and Westlake Center in Downtown Seattle, making no intermediate stops. ...
, constructed for the
Century 21 Exposition The Century 21 Exposition (also known as the Seattle World's Fair) was a world's fair held April 21, 1962, to October 21, 1962, in Seattle, Washington, United States.Seattle Center Seattle Center is an arts, educational, tourism and entertainment center in Seattle, Washington, United States. Spanning an area of 74 acres (30 ha), it was originally built for the 1962 World's Fair. Its landmark feature is the tall Space Needle ...
in Lower Queen Anne and
Westlake Center Westlake Center is a four-story shopping center and 25-story office tower in downtown Seattle, Washington, United States. The southern terminus of the Seattle Center Monorail, it is located across Pine Street from Westlake Park, between 4th and ...
in Downtown. Local transit agencies offer trip planners on their web sites that provides information for public transit in Seattle and surrounding areas (King, Pierce, and Snohomish counties). Riders enter their intended origin and destination, along with optional time, date, and other information, and the trip planner displays itineraries showing the stops, departure and arrival times, and times to get from the origin to the destination. Trip planning, schedules, and real-time arrivals are also available on third-party maps, such as
Google Maps Google Maps is a web mapping platform and consumer application offered by Google. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets ( Street View), real-time traffic conditions, and rou ...
, and through dedicated apps such as OneBusAway.
BoltBus BoltBus was an intercity bus common carrier and a division of Greyhound Lines that operated from March 2008 until July 2021 in the northeast and western United States and British Columbia, Canada. As least one ticket on every bus was randomly s ...
began offering Seattle's first curbside intercity coach service in May 2012, with Portland as its first destination. The service later expanded with stops in Everett and Tacoma, but was discontinued by parent company Greyhound in 2021.


Public transportation statistics

According to
Moovit Moovit ( he, מוביט) is an Israel-based mobility as a service provider and journey planner app. It has been owned by Intel through the Mobileye subsidiary since 2020. The company uses both crowdsourced and official public transit data to pro ...
, the average amount of time Seattle-area commuters spend using public transit on a weekday is 74 minutes. 27% of public transit riders commute for more than two hours every day. The average amount of time people wait at a stop or station for public transit is 14 minutes, while 22% of riders wait for over 20 minutes on average every day. The average distance people usually ride in a single trip with public transit is 12.5 km, while 34% travel for over 12 km in a single direction.


Bicycle

There are extensive multi-use car-free regional pathways linking the city and county to the surrounding areas, including the King County Regional Trails System, which has of trails throughout the county. Many of the trails were converted from former railways, including the popular Burke-Gilman Trail. The
Seattle Department of Transportation The Seattle Department of Transportation (SDOT) is a municipal government agency in Seattle, Washington that is responsible for the maintenance of the city's transportation systems, including roads, bridges, and public transportation. The agency ...
aims to develop a network of
bike lanes Bike lanes (US) or cycle lanes (UK) are types of bikeways (cycleways) with lanes on the roadway for cyclists only. In the United Kingdom, an on-road cycle-lane can be firmly restricted to cycles (marked with a solid white line, entry by motor ...
, including lanes on streets, protected bike lanes, and trails, within the city by 2034. An urban bike sharing system, named Pronto Cycle Share, was launched in October 2014 and discontinued in March 2017. A pilot program allowing private dockless bike sharing companies to operate within the city began in July 2017, making Seattle the first major city in North America to feature such a system.


Airports

The Seattle metropolitan area has several airports that support commercial use as well as general aviation. The city's primary commercial airport is
Seattle–Tacoma International Airport Seattle–Tacoma International Airport , branded as SEA Airport and also referred to as Sea–Tac (), is the primary commercial airport serving the Seattle metropolitan area in the U.S. state of Washington. It is in the city of SeaTac, which ...
, locally known as Sea-Tac Airport and located in the city of SeaTac, which is named for the airport. It is operated by the Port of Seattle and is served by a number of airlines connecting the region with international, national, and domestic destinations. The airport is a major hub for
Delta Air Lines Delta Air Lines, Inc., typically referred to as Delta, is one of the major airlines of the United States and a legacy carrier. One of the world's oldest airlines in operation, Delta is headquartered in Atlanta, Georgia. The airline, along w ...
as well as
Alaska Airlines Alaska Airlines is a major American airline headquartered in SeaTac, Washington, within the Seattle metropolitan area. It is the sixth largest airline in North America when measured by fleet size, scheduled passengers carried, and the num ...
and its regional subsidiary,
Horizon Air Horizon Air Industries, Inc., operating as Horizon Air, is an American regional airline based in SeaTac, Washington, United States. Horizon Air and its sister carrier Alaska Airlines are subsidiaries of Alaska Air Group, and all Horizon-opera ...
.
Paine Field Paine Field , also known as Snohomish County Airport, is a commercial and general aviation airport serving the Seattle metropolitan area in the U.S. state of Washington. It is located in unincorporated Snohomish County, Washington, between the ...
in Everett also began operating flights in March 2019 following the construction of a two-gate passenger terminal. It receives a limited number of daily flights from Alaska Airlines; prior to 2021, it also had
United Airlines United Airlines, Inc. (commonly referred to as United), is a major American airline headquartered at the Willis Tower in Chicago, Illinois.
service. Closer to downtown,
Boeing Field Boeing Field, officially King County International Airport , is a public airport owned and operated by King County, five miles south of downtown Seattle, Washington. The airport is sometimes referred to as KCIA (King County International Airp ...
is primarily used for general aviation, cargo flights, and testing/delivery of Boeing airliners. In 2005, Southwest Airlines requested permission to move passenger operations from Sea-Tac to Boeing Field but were rejected by the county. Boeing Field has commercial flights to the
San Juan Islands The San Juan Islands are an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of ...
. The Kenmore Air Harbor Seaplane Base on Lake Union, immediately north of downtown, is used by two airlines that operate floatplanes to the San Juan Islands and British Columbia.


New regional airport

The state government formed the Commercial Aviation Coordinating Commission (CACC) in 2019 to investigate sites for a new commercial airport that would serve the Puget Sound region and relieve pressure at Sea-Tac. The new airport would accommodate 20 million passengers annually by 2050 and have two runways. The plan assumes that Sea-Tac and Paine Field would be expanded to handle 67 million annual passengers, which would fall below the projected 94 million annual passengers using Seattle-area airports. In September 2022, the commission identified expansion of Paine Field or the construction of a new airport in southern Pierce County or northern Thurston County as potential options. The wider field of 10 candidates also included options in Kitsap, Skagit, and Snohomish counties. Opposition to the Pierce County and Thurston County sites formed following the September 2022 announcement, citing potential noise and traffic impacts. The CACC is planned to recommend a site to the state legislature by June 2023.


See also

* Lake Washington steamboats and ferries *
Street layout of Seattle The street layout of Seattle is based on a series of disjointed rectangular street grids. Most of Seattle and King County use a single street grid, oriented on true north. Near the center of the city, various land claims were platted in the 19th ...
*


Bibliography

* *


References


External links


Getting Around Seattle
from
Seattle Department of Transportation The Seattle Department of Transportation (SDOT) is a municipal government agency in Seattle, Washington that is responsible for the maintenance of the city's transportation systems, including roads, bridges, and public transportation. The agency ...

Washington State Department of Transportation
{{DEFAULTSORT:Transportation In Seattle
Seattle, Washington Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest region ...