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State Route 99 (SR 99), also known as the Pacific Highway, is a
state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...
in the Seattle metropolitan area, part of the U.S. state of Washington. It runs from
Fife Fife (, ; gd, Fìobha, ; sco, Fife) is a council area, historic county, registration county and lieutenancy area of Scotland. It is situated between the Firth of Tay and the Firth of Forth, with inland boundaries with Perth and Kinross (i ...
in the south to Everett in the north, passing through the cities of Federal Way, SeaTac, Seattle, Shoreline, and Lynnwood. The route primarily follows arterial streets, including Aurora Avenue, and has several freeway segments, including the tolled SR 99 Tunnel in
Downtown Seattle Downtown is the central business district of Seattle, Washington. It is fairly compact compared with other city centers on the U.S. West Coast due to its geographical situation, being hemmed in on the north and east by hills, on the west by ...
. SR 99 was officially named the William P. Stewart Memorial Highway by the state legislature in 2016, after a campaign to replace an unofficial moniker honoring Confederate president
Jefferson Davis Jefferson F. Davis (June 3, 1808December 6, 1889) was an American politician who served as the president of the Confederate States from 1861 to 1865. He represented Mississippi in the United States Senate and the House of Representatives as a ...
. SR 99 was originally a section of
U.S. Route 99 U.S. Route 99 (US 99) was a main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the US–Mexico border to Blaine, Washington, on the U.S.-Canada border ...
(US 99), which was once the state's primary north–south highway. US 99 was created in 1926 and replaced earlier local roads that date back to the 1890s and state roads designated as early as 1913. The highway was moved onto the Alaskan Way Viaduct in 1953, replacing a congested stretch through Downtown Seattle, and other sections were built to expressway standards in the 1950s. US 99 was ultimately replaced by the Tacoma–Everett section of Interstate 5 (I-5), which opened in stages between 1965 and 1969. The route was de-certified in 1969 and SR 99 was created to keep segments of the highway under state control. After decades of crime on some sections of SR 99, various city governments funded projects to beautify the highway and convert it into a boulevard. A section of the highway in Tukwila was transferred to city control in 2004, creating a gap in the route between the interchanges of SR 518 and SR 599. The Alaskan Way Viaduct was closed on January 11, 2019, and was replaced with a downtown bored tunnel that opened on February 4, 2019. The replacement project was spurred by the
2001 Nisqually earthquake The 2001 Nisqually earthquake occurred at on February 28, 2001 and lasted nearly a minute. The intraslab earthquake had a moment magnitude of 6.8 and a maximum Mercalli intensity of VIII (''Severe''). The epicenter was in the southern Puge ...
, which damaged the viaduct and left it vulnerable to further damage, as well as city plans to revitalize the Seattle waterfront. The $3 billion megaproject was mired in planning delays for several years before construction began in 2011 with the partial demolition of the viaduct. The tunnel was constructed using Bertha, the world's largest tunnel boring machine at the time of its launch in 2013, which had a two-year halt and completed its bore in 2017. The viaduct was demolished in 2019, leaving room for an expanded park promenade on Alaskan Way that is planned to be completed in 2024.


Route description

SR 99 follows a section of former
U.S. Route 99 U.S. Route 99 (US 99) was a main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the US–Mexico border to Blaine, Washington, on the U.S.-Canada border ...
(US 99) within the Seattle metropolitan area, from
Fife Fife (, ; gd, Fìobha, ; sco, Fife) is a council area, historic county, registration county and lieutenancy area of Scotland. It is situated between the Firth of Tay and the Firth of Forth, with inland boundaries with Perth and Kinross (i ...
to southern Everett. It is officially designated as the William P. Stewart Memorial Highway, but is commonly known as the Pacific Highway or by one of its local names. The entire highway is listed as part of the National Highway System, a national network of roads identified as important to the national economy, defense, and mobility. A section of the highway from Tukwila to Shoreline is also designated as a Highway of Statewide Significance by the
state legislature A state legislature is a legislative branch or body of a political subdivision in a federal system. Two federations literally use the term "state legislature": * The legislative branches of each of the fifty state governments of the United Sta ...
. The Washington State Department of Transportation (WSDOT) estimates that average traffic volumes on SR 99, measured in terms of average annual daily traffic for 2016, range from a minimum of 17,000 vehicles on Everett Mall Way to a maximum of 97,000 at the First Avenue South Bridge in Seattle.


Fife to SeaTac

SR 99 begins in Fife as an extension of 54th Avenue East at a
partial cloverleaf interchange A partial cloverleaf interchange or parclo is a modification of a cloverleaf interchange. The design has been well received, and has since become one of the most popular freeway-to-arterial interchange designs in North America. It has also bee ...
with Interstate 5. Immediately north of the interchange, SR 99 turns east onto Pacific Highway and passes the Emerald Queen Casino, a gambling and hotel facility operated by the Puyallup Tribe, and a commercial district at the outskirts of Fife. The highway makes a gradual turn to the north, parallel to Interstate 5 and the West Fork of Hylebos Creek, and enters
Milton Milton may refer to: Names * Milton (surname), a surname (and list of people with that surname) ** John Milton (1608–1674), English poet * Milton (given name) ** Milton Friedman (1912–2006), Nobel laureate in Economics, author of '' Free t ...
. SR 99 travels north along a ridge and crosses into
King County King County is located in the U.S. state of Washington. The population was 2,269,675 in the 2020 census, making it the most populous county in Washington, and the 13th-most populous in the United States. The county seat is Seattle, also the st ...
, turning northeast and entering the city of Federal Way. The road cuts through a forested part of the Hylebos basin near West Hylebos Wetlands Park and reaches a commercial district surrounding Kitts Corner. At Kitts Corner, the highway intersects the western section of State Route 18, which continues east to an interchange with I-5 and onto a freeway traveling towards
Auburn Auburn may refer to: Places Australia * Auburn, New South Wales * City of Auburn, the local government area *Electoral district of Auburn *Auburn, Queensland, a locality in the Western Downs Region *Auburn, South Australia *Auburn, Tasmania *Aub ...
and
Covington Covington may refer to: People * Covington (surname) Places United Kingdom * Covington, Cambridgeshire * Covington, South Lanarkshire United States * Covington, Georgia * Covington, Indiana * Covington, Kentucky, the largest American cit ...
. SR 99 continues due north through Federal Way's main commercial strip and passing Celebration Park, The Commons at Federal Way, and
Steel Lake Steel Lake or Lake Steel or lakes named Steel, may refer to: Places * Steel Lake (Washington), Washington State, United States; a lake in King County ** Steel Lake Park, Federal Way, King County, Washington, United States; a park on the southern sh ...
. The highway gains a set of high-occupancy vehicle lanes that are also open to right turns into parking lots and side streets. From northern Federal Way to the Redondo area of
Des Moines Des Moines () is the capital and the most populous city in the U.S. state of Iowa. It is also the county seat of Polk County. A small part of the city extends into Warren County. It was incorporated on September 22, 1851, as Fort Des Moines, ...
, SR 99 is concurrent with SR 509, which continues southwest to
Dash Point State Park Dash Point State Park is a Washington state park on Puget Sound that straddles the line between King and Pierce counties. The park has over of shoreline, 140 campsites, 11 miles of trails for hiking and mountain biking, and offers beachcombing, ...
and northwest to downtown Des Moines, for . The two highways pass
Saltwater State Park Saltwater State Park is a plot of second-growth timber on Puget Sound in the city of Des Moines, Washington, United States. The main attraction is of saltwater beachfront, including a sandy swimming beach in the southwest corner, and rocky tidefl ...
and the former Midway
landfill A landfill site, also known as a tip, dump, rubbish dump, garbage dump, or dumping ground, is a site for the disposal of waste materials. Landfill is the oldest and most common form of waste disposal, although the systematic burial of the waste ...
before splitting near Highline College at an intersection with Kent Des Moines Road ( SR 516). SR 99 then enters the city of SeaTac and continues north as International Boulevard, passing a federal detention center and light rail station on the southwest side of Angle Lake. The highway runs along the east side of Seattle–Tacoma International Airport and its expressway, serving the airport's terminals, parking garage, light rail station, and nearby hotels. SR 99 terminates at an interchange with SR 518 in southern Tukwila, near the airport's consolidated rental car facility and the Tukwila light rail station. A section of International Boulevard in Tukwila forms the gap between the two segments of SR 99.


Seattle and Aurora Avenue

SR 99 resumes at the north end of Tukwila International Boulevard and supersedes SR 599, a short freeway connecting to I-5, near the
Duwamish River Edmonds plans to add widened sidewalks with planted buffer zones, new crosswalks, and turn lane pockets to its section of SR 99 beginning in 2022. The city of Seattle also plans to improve its section of Aurora Avenue North, but funding shortages and the timing of WSDOT repaving projects have led to a lack of sidewalks along some sections of the street. The Move Ahead Washington package, passed in 2022, includes $50 million in funds to rebuild sections of Aurora Avenue to include sidewalks, bicycle lanes, and landscaping. The Aurora Bridge, part of the expressway linking Aurora Avenue to downtown Seattle, was the site of frequent suicide jumps until a set of emergency phones and new fences were installed in 2011 at a cost of $4.6 million to deter would-be jumpers. The bridge and its expansion joints underwent a major seismic retrofit that was completed in 2012 at a cost of $5.7 million; the retrofit was followed by a repainting and repaving project that was completed in two stages between 2016 and 2018 at a cost of $35 million. On September 24, 2015, a collision between an amphibious Duck tour vehicle and a charter bus on the Aurora Bridge killed four people and injured 50 more. The incident raised questions regarding the safety of Aurora Bridge, which lacks a median barrier and is the narrowest six-lane bridge in the state, with a lane width of . Other sections of Aurora Avenue were retrofitted to install median barriers in 1973, and the state government considered a 2003 plan to put barriers on the bridge and relocate the sidewalks to compensate for the additional weight but ultimately deferred any improvements. In the aftermath of the crash and its three-year-long court case, WSDOT and the Seattle Department of Transportation have disagreed over whether to install a center barrier or median zipper system, and which agency would be responsible for funding either option.


Viaduct replacement and tunnel project


Proposals and earthquake studies

Proposals to replace the Alaskan Way Viaduct date back to the 1970s during attempts to revitalize the city's waterfront for tourism and recreation rather than traditional industrial uses. A similar double-decker freeway, the Cypress Street Viaduct in Oakland, California, collapsed during the
Loma Prieta earthquake The 1989 Loma Prieta earthquake occurred on California's Central Coast on October 17 at local time. The shock was centered in The Forest of Nisene Marks State Park in Santa Cruz County, approximately northeast of Santa Cruz on a section of t ...
in 1989 and killed 42 people, leading to intensified calls to replace the viaduct due to the realized earthquake risk. A 1995 study commissioned by the state government after the Kobe earthquake found vulnerabilities in the Alaskan Way Viaduct's design that could cause severe damage and collapse during a major earthquake, along with
liquefaction In materials science, liquefaction is a process that generates a liquid from a solid or a gas or that generates a non-liquid phase which behaves in accordance with fluid dynamics. It occurs both naturally and artificially. As an example of the ...
risks due to the underlying reclaimed land that the highway was built on. The study estimated that it would cost $118 million (equivalent to $ in dollars) to demolish the viaduct, $344 million (equivalent to $ in dollars) to retrofit the structure for earthquake resistance, and $530 million (equivalent to $ in dollars) to build a new elevated freeway to replace it; other options included replacing the freeway with a tunnel or a surface boulevard with public transit on Alaskan Way, similar to San Francisco's Embarcadero. On February 28, 2001, the Nisqually earthquake struck the Seattle area with strong shaking that caused signs of visible damage on the Alaskan Way Viaduct. The freeway was shut down for inspections, which found small cracks and other minor damage to non-structural elements that allowed it to reopen within 26 hours. Four more closures were ordered later in March and April due to pieces of concrete dropping onto the streets below, requiring emergency repairs to add steel rods to reinforce the columns. The first repairs were completed in November at a cost of $1.8 million and a set of new vehicle weight restrictions were implemented; in total, $14.5 million was spent on various repairs due to earthquake damage. Annual inspections and continued monitoring found that the earthquake had caused settling of up to into the soil and weakened connections between the columns and highway decks. Additional investigations also found unrelated damage to the underlying seawall, which would need to be rebuilt to prevent a resulting collapse of the viaduct. An ongoing state study investigating a viaduct replacement strategy was accelerated by the state legislature using $5 million in funds, while a separate engineering study suggested immediate demolition of the structure due to a 1-in-20 chance of collapse in an earthquake within the next decade. In late 2001, WSDOT began work on an environmental impact statement (EIS) for the viaduct replacement project using emergency funds from the state legislature and consulted the city government and community leaders to generate concepts. By the following year, a set of 76 concepts organized into four general alternatives were presented for public feedback. Among the options were an elevated freeway similar to the current viaduct and several tunnel concepts, including a bored tunnel, a two-level cut-and-cover tunnel, and a mined tunnel carrying one direction of traffic. Five finalist options were paired with the seawall replacement and evaluated in June 2002, with costs ranging from $3.5 billion for a rebuilt viaduct to $8.8–$11.6 billion for various tunnel designs.


Tunnel concept, advisory votes, and subprojects

The tunnel plan was endorsed by WSDOT and the city council based on public support for waterfront revitalization, but design changes would be needed to bring down its cost. After voters rejected a statewide gas tax referendum that would have funded a portion of the project's cost, WSDOT and the city government drafted new cost-saving concepts for a shorter tunnel and a surface boulevard that were included in the five options evaluated by the draft EIS in 2004. The six-lane, $4 billion tunnel option was chosen as the preferred alternative by WSDOT in late 2004, despite backlash from activists groups who favored a rebuilt viaduct or a waterfront boulevard. The state legislature passed an $8.5 billion gas tax program in 2005, allocating $2 billion in funding for the viaduct replacement. A supplemental EIS was prepared in 2006 to include new project requirements for the Battery Street Tunnel area and evaluate the cut-and-cover tunnel and elevated options. A pair of advisory, non-binding
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 was held in March 2007 to find a consensus between the $2.8 billion elevated replacement supported by Governor Christine Gregoire and a smaller four-lane tunnel with surface public transit improvements that would cost $3.4 billion and was supported by Mayor Greg Nickels; Nickel's "hybrid tunnel" proposal was rejected by Gregoire and state legislators prior to the vote based on operational and safety problems identified by WSDOT. Both options were rejected by voters, with 70 percent opposed to the tunnel and 55 percent opposed to the elevated concept. The governments of Washington state, King County, and Seattle agreed to re-evaluate the planning process for the viaduct replacement and split the main proposals from essential safety and traffic improvements that would be included in all alternatives. A $915 million package of projects was approved for immediate construction, beginning with work to strengthen sinking columns in late 2007 and repairs to the Battery Street Tunnel the following year. Although the column strengthening project was declared successful, further inspections found that the Columbia Street onramp had sunk an additional during the nearby construction. The southernmost stretch of the viaduct, between Holgate and King streets, was demolished in October 2011 and replaced with a six-lane elevated freeway that opened the following year at a cost of $115 million. Seattle voters approved a bond measure in 2012 to replace the Alaskan Way Seawall; the project began construction in 2013 and was completed in 2017 at a cost of $410 million, running 21 percent overbudget.


Deep-bored tunnel approved and contested

The state government announced a new timeline for the project in January 2008, with Governor Gregoire declaring her intention to demolish the viaduct by 2012 regardless of Seattle's approval. Eight new concepts for a four-lane replacement were developed by June from a set of priorities developed for SR 99, I-5, and public transit in downtown. The eight options included two surface boulevards with transit improvements, a one-way couplet, a set of two elevated freeways, an elevated freeway with a rooftop park, and three tunnels: a cut-and-cover tunnel, a lidded trench, and a deep-bored tunnel. Several early concepts, including a bridge across Elliott Bay and a complete rebuild of the double-decked viaduct, were rejected by the panel of public officials. The final decision was delayed until after the gubernatorial election, but would have to meet an end-of-year deadline imposed by the state legislature. In December 2008, two finalists were chosen for further study and consideration by the state legislature: a $2.3 billion elevated freeway and the $2.2 billion surface-transit option. While the deep-bored tunnel was not chosen as one of the two finalists, it remained popular with tunnel activists and was considered separately due to its $4.25 billion cost (equivalent to $ in dollars). On January 13, 2009, Governor Gregoire signed an agreement with Mayor Nickels and King County Executive Ron Sims to ratify the deep-bored tunnel as the replacement for the Alaskan Way Viaduct, to be completed by 2015. $2.8 billion would be covered by state gas taxes and federal funds, leaving a $1.4 billion shortfall to be filled by the local government and potential tolls. The state legislature passed a bill in April 2009 to commit $2.8 billion in state funding for the tunnel project, which Governor Gregoire signed the following month. In total, more than 90 alternatives were considered before the final agreement was reached in 2009. The tunnel project received $300 million in funds from the Port of Seattle in exchange for design input on the surface boulevard that would replace Alaskan Way. Neighborhood and environmental activist Mike McGinn was elected mayor in 2009, largely on an anti-tunnel platform, and threatened to veto project agreements until the state took responsibility for cost overruns that would fall upon Seattle. The city council approved a non-binding resolution to authorize the tunnel project, pending the outcome of contract bidding, which was completed in December 2010 with the selection of Seattle Tunnel Partners (STP), a consortium led by Dragados USA. STP presented a $1.09 billion plan to use a tunnel boring machine, the world's widest, to complete the tunnel by late 2015. WSDOT signed the tunnel construction contract in January 2011, sending a set of contractor agreements to the city council for approval. The state's agreements were approved by the city council in February 2011, shortly before being symbolically vetoed by Mayor McGinn; the veto was overridden by the end of the month—the 10th anniversary of the Nisqually earthquake—with an 8–1 city council majority. McGinn joined other tunnel opposition groups to file a referendum questioning whether the city council had the authority to approve the state and federal agreements. The referendum was initially blocked by a lawsuit filed by the city, but was approved and placed on the August 2011 ballot by a county judge. The referendum was approved by 58 percent of voters on August 16, 2011, authorizing the city's agreements with WSDOT. The Federal Highway Administration completed its analysis of the project's final EIS and issued its record of decision with WSDOT later that month, allowing pre-construction activities to begin.


Tunnel boring and viaduct closure

After the demolition of the viaduct's southernmost stretch and its lanes were realigned onto an adjacent bypass in 2012, crews began excavation of a launch pit to house the tunnel boring machine. Local officials, with the notable absence of Mayor Mike McGinn, participated in a ceremonial groundbreaking was held for the tunnel on June 20, 2012. The tunnel boring machine was manufactured by Hitachi Zosen in Osaka, Japan, and named " Bertha" in honor of Mayor
Bertha Knight Landes Bertha Ethel Knight Landes (October 19, 1868, – November 29, 1943) was the first female mayor of a major American city, serving as mayor of Seattle, Washington from 1926 to 1928. After years of civic activism, primarily with women's organiz ...
. Bertha arrived in Seattle on April 2, 2013, and its 40 pieces were assembled in the launch pit before tunnel boring began on July 30—setting a record for the world's largest tunnel boring machine. Tunnel boring was halted at near South Main Street in December 2013 after the machine encountered an unknown object that caused it to overheat. The object was found to be a steel pipe and
well casing Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellst ...
that was left behind by a groundwater research crew for the project in 2002. The pipe caused extensive damage to Bertha's cutterhead and main bearing seal, requiring the excavation of a rescue pit for repairs. Bertha reached the completed excavation pit in March 2015 and the machine's front end was disassembled and lifted to the surface to repair the damage, which was found to be more extensive than previously thought. The repaired cutterhead was lowered into the access pit in August 2015 and tunnel boring resumed on December 22, 2015, reaching past the pit the following month. During the two-year halt in tunnel boring, public officials considered alternative plans to accelerate demolition of the viaduct while awaiting tunnel completion. The project was named one of the worst boondoggles in the United States by several transportation groups and critics, due in part to the stoppage and its high cost. Tunnel boring was halted by Governor Jay Inslee in January 2016 due to the appearance of a sinkhole in Pioneer Square, but resumed the following month. The machine passed under the Alaskan Way Viaduct in April 2016, requiring a closure while the structure was monitored for movement, and reached the halfway mark in October. Bertha completed its bore on April 4, 2017, arriving at the north portal near Aurora Avenue for disassembly, which was completed in August. The tunnel portals and their maintenance areas were completed while work on the double-decker freeway inside the tunnel progressed behind the machine. The Alaskan Way Viaduct permanently closed on January 11, 2019, beginning a three-week realignment of ramps at the portals as ramps were prepared for the opening of the tolled downtown tunnel on February 4, 2019. The remaining section of the viaduct was demolished in stages between February and November 2019, with some of the of rubble deposited into the Battery Street Tunnel as it was filled and sealed. A three-block section of Aurora Avenue between Denny Way and the new tunnel portal was raised and reconnected to cross-streets in 2019. The Alaskan Way promenade and boulevard project is planned to cost $668 million and will be completed in 2024. The new boulevard will be eight lanes wide in some sections due to requirements placed by WSDOT for Colman Dock access and the Port of Seattle for truck access. The viaduct replacement megaproject is estimated to cost $3.3 billion, with $200 million of construction costs and additional funds for ongoing maintenance to be raised through tunnel tolls that began to be collected on November 9, 2019.


Names and designations

The name of SR 99 differs from city to city, with several sections named the Pacific Highway and International Boulevard, a moniker invented by SeaTac for the
1990 Goodwill Games The 1990 Goodwill Games was the second edition of the international multi-sport event created by Ted Turner, which was held between July 20 and August 5, 1990. Following an inaugural edition in Moscow, the second games took place in Seattle, United ...
hosted by King County. In Seattle, the highway is known as East Marginal Way and Aurora Avenue North; in Everett, it uses Evergreen Way and Everett Mall Way. A four-block section of former SR 99 between Denny Way and the new tunnel portal was renamed to 7th Avenue North and Borealis Avenue in early 2019 as part of the reconfiguration of Aurora Avenue. The United Daughters of the Confederacy unsuccessfully lobbied the state legislature in 1939 to designate the entirety of US 99 within the state as part of the national " Jefferson Davis Highway". A pair of granite markers were installed the following year in Blaine and Vancouver to commemorate the highway, allegedly to recognize Davis's contributions to the territorial development of Washington as U.S. Secretary of War. The two markers were removed in 1998 and 2002, and are now located at the privately owned
Jefferson Davis Park Jefferson Davis Park is a private park located outside Ridgefield, Washington, in the southwestern portion of the state. The granite markers of the unofficial (in Washington) Jefferson Davis Memorial Highway are at the center of the park surrou ...
in Ridgefield. The State House of Representatives unanimously approved a bill in 2002 that would have removed Davis' name from the road, but it was deferred by a State Senate committee. The attempted renaming, led by Snohomish representative
Hans Dunshee Hans M. Dunshee (born October 26, 1953) is an American businessman and politician of the Democratic Party. He is a former member of the Washington House of Representatives, representing the 44th Legislative District. Dunshee was born in Los Ang ...
, generated political controversy and death threats against legislators from people opposed to the bill. The bill was revived in May 2016 and was passed unanimously by both houses of the legislature, renaming SR 99 for William P. Stewart, an African-American Civil War veteran and early settler in Snohomish. New highway signs for the William P. Stewart Memorial Highway were installed the following year, amid a new wave of Confederate monument removals.


Public transit

SR 99 is a major regional public transit corridor and carries several
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 ...
routes and a light rail line in SeaTac. The highway features
bus lane A bus lane or bus-only lane is a lane restricted to buses, often on certain days and times, and generally used to speed up public transport that would be otherwise held up by traffic congestion. The related term busway describes a roadway ...
s and business access and transit lanes (BAT lanes) in several locations to give buses traffic priority while retaining access to right turns. Pierce Transit route 500 runs on the SR 99 and Pacific Highway corridor between Tacoma Dome Station and Federal Way Transit Center. Through Federal Way and SeaTac, the highway is served by the RapidRide A Line, an rapid bus route that debuted in 2010 and features enhanced bus stops and transit signal priority. Sound Transit's Link light rail trains on the 1 Line run along elevated tracks above or near SR 99 from Angle Lake station to Tukwila International Boulevard station at the SR 518 interchange. The Alaskan Way Viaduct carried several non-stop routes connecting Downtown Seattle to West Seattle (including the RapidRide C Line) and
Burien Burien ( ) is a suburban city in King County, Washington, United States, located south of Seattle on Puget Sound. As of the 2020 census, Burien's population was 52,066, which is a 56.3% increase since incorporation in 1993. An annexation in 2010 ...
. Aurora Avenue is served by the RapidRide E Line, which carried 18,000 passengers daily in 2017 and is the busiest bus route in the King County Metro system. The E Line debuted in 2014, replacing Route 358—itself the successor to Route 359, which was retired in 1999 after a Metro bus was involved in a shooting and crashed off the Aurora Bridge. The E Line terminates in Downtown Seattle and near the county line at the Aurora Village Transit Center, where Community Transit's route 101 and Swift Blue Line begins. Swift features off-board fare payment and longer spacing between stops, and runs from Shoreline to Everett Station via Evergreen Way. The Everett Mall Way section of SR 99 is served by Everett Transit route 7, which connects the Everett Mall to Downtown Everett and Everett Station.


Major intersections


References


External links

*
Highways of Washington StateSR 99 Alaskan Way Viaduct Replacement Program
{{DEFAULTSORT:Washington State Route 099
099 99 may refer to: * 99 (number), the natural number following 98 and preceding 100 * one of the years 99 BC, AD 99, 1999, 2099, etc. Art, entertainment, and media * '' The 99'', a comic series based on Islamic culture Film, television and radio ...
Transportation in Pierce County, Washington Transportation in King County, Washington Transportation in Snohomish County, Washington Seattle metropolitan area U.S. Route 99