State Route 525 (SR 525) is a state highway located in Snohomish and

Island An island or isle is a piece of subcontinental land completely surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be ...

counties in the western region of the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...

of Washington. SR 525 begins at an interchange with Interstate 5 (I-5) and

I-405 Interstate 405 may refer to: * Interstate 405 (California), a bypass of Los Angeles, California * Interstate 405 (Oregon) Interstate 405 (I-405), also known as the Stadium Freeway No. 61, is a short north–south Interstate Highway in Portl ...

in Lynnwood and travels north to SR 99 as a four-lane

controlled-access 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 i ...

. From Lynnwood, the highway serves Mukilteo and becomes the terminus of SR 526 before taking its ferry route to

Clinton Clinton is an English toponymic surname, indicating one's ancestors came from English places called Glympton or Glinton.Hanks, P. & Hodges, F. ''A Dictionary of Surnames''. Oxford University Press, 1988 Clinton has frequently been used as a given ...

Whidbey Island Whidbey Island (historical spellings Whidby, Whitbey, or Whitby) is the largest of the islands composing Island County, Washington, in the United States, and the largest island in Washington State. (The other large island is Camano Island, ...

. SR 525 traverses the island's interior as part of the Whidbey Island Scenic Byway before the designation ends at an intersection with SR 20 south of Coupeville. SR 525 was established during the 1964 state highway renumbering as the successor to Secondary State Highway 1D (SSH 1D) on Whidbey Island and SSH 1I in Mukilteo and Lynnwood, themselves established in 1937. The highway, at its codification in 1970, traversed the north–south length of Whidbey Island and ended at SR 536 near

Anacortes Anacortes ( ) is a city in Skagit County, Washington, United States. The name "Anacortes" is an adaptation of the name of Anne Curtis Bowman, who was the wife of early Fidalgo Island settler Amos Bowman.spur route A spur route is a short road forming a branch from a longer, more important road such as a freeway, Interstate Highway, or motorway. A bypass or beltway should not be considered a true spur route as it typically reconnects with another or the s ...

in Mukilteo that has connected SR 525 to SR 526 via Paine Field Boulevard since it was signed in 2001.

Route description

SR 525 begins at the Swamp Creek Interchange with

I-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 ...

, also serving as the northern terminus of

, located in Lynnwood in southern

Snohomish County Snohomish County () is a county located in the U.S. state of Washington. With a population of 827,957 as of the 2020 census, it is the third-most populous county in Washington, after nearby King and Pierce counties, and the 75th-most populo ...

. The four-lane

travels north past

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 Terrace ...

and 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 b ...

with Alderwood Mall Parkway, which serves the eponymous mall. SR 525 continues north under

overpass An overpass (called an overbridge or flyover in the United Kingdom and some other Commonwealth countries) is a bridge, road, railway or similar structure that crosses over another road or railway. An ''overpass'' and ''underpass'' together form ...

es carrying 164th Street and 148th Street before reaching its partial cloverleaf interchange with SR 99, where the freeway ends. The highway becomes the four-lane Mukilteo Speedway and travels northwest into the city of Mukilteo, serving its commercial and industrial areas located south of Paine Field. SR 525 intersects its

spur route A spur route is a short road forming a branch from a longer, more important road such as a freeway, Interstate Highway, or motorway. A bypass or beltway should not be considered a true spur route as it typically reconnects with another or the s ...

, which travels north as Paine Field Boulevard towards the Boeing Everett Factory, before it serves as the western terminus of SR 526. The highway gains a ferry holding lane on its northbound

shoulder The human shoulder is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) as well as associated muscles, ligaments and tendons. The articulations between the bones of the shoulder m ...

as it approaches the Mukilteo

ferry terminal A passenger terminal is a structure in a port which services passengers boarding and leaving water vessels such as ferries, cruise ships and ocean liners. Depending on the types of vessels serviced by the terminal, it may be named (for example) ...

, where the designation of SR 525 is carried onto the

Whidbey Island Ferry 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 loca ...

across

Possession Sound Possession Sound is part of Puget Sound, located in the U.S. state of Washington between Whidbey Island and the shoreline of Snohomish County approximately between the cities of Everett and Mukilteo. Possession Sound connects the main Puge ...

. The terminal is east of

Mukilteo Lighthouse Park Mukilteo Lighthouse Park encompasses the lighthouse at the west end of the city of Mukilteo, Washington, and south of it. The property is west and south of the Washington State Ferries terminal with ferry service to Clinton, Whidbey Island, and ...

and adjacent to a

train station A train station, railway station, railroad station or depot is a railway facility where trains stop to load or unload passengers, freight or both. It generally consists of at least one platform, one track and a station building providing ...

served by Sounder commuter trains. The Mukilteo–Clinton ferry, operated by

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 ...

(WSF), takes approximately 20 minutes for each of its 39 daily round-trip crossings. , WSF charges a fare of $5.05 per walk-on passenger and $8.95 per vehicle during off-peak seasons, with varying fares depending on passenger age and vehicle size. SR 525 leaves the ferry terminal at

and travels west through the interior of

in unincorporated

Island County Island County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 86,857. Its county seat is Coupeville, while its largest city is Oak Harbor. The county's name reflects the fact that it is compose ...

as part of the Whidbey Island Scenic Byway, a state scenic byway. The highway turns north along Holmes Harbor in Freeland and continues through Greenbank before SR 525 terminates at SR 20 south of Coupeville and the

Naval Outlying Landing Field Coupeville Naval Outlying Landing Field Coupeville—or NOLF Coupeville— is a military airport located two miles (3 km) southeast of Coupeville, Washington, in Island County. The airfield is owned and operated by the United States Navy. NOLF Coupevil ...

. Every year, the

Washington State Department of Transportation 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. Established in 1905, it is ...

(WSDOT) conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of

average annual daily traffic Annual average daily traffic, abbreviated AADT, is a measure used primarily in transportation planning, transportation engineering and retail location selection. Traditionally, it is the total volume of vehicle traffic of a highway or road for a ...

(AADT), which is a measure of traffic volume for any average day of the year. In 2012, WSDOT calculated that the busiest section of SR 525 was its southern terminus at I-5 and I-405, serving 61,000 vehicles, while the least busiest section of the highway was at the Mukilteo ferry terminal, serving 5,700 vehicles. SR 525 is designated as part of the National Highway System from Lynnwood to the Mukilteo ferry terminal, classifying it as important to the national economy, defense, and mobility. WSDOT designates the entire route of SR 525 as a Highway of Statewide Significance, which includes highways that connect major communities in the

state of Washington Washington (), officially the State of Washington, is a state in the Pacific Northwest region of the Western United States. Named for George Washington—the first U.S. president—the state was formed from the western part of the Washingto ...

History

SR 525 uses the

between Mukilteo and

, which began as a route of the

Island Transportation Company The Island Transportation Company was a shipping company that was briefly operational in Puget Sound from 1889 to 1900. Formation and operations The company was organized in April 1889, by Herbert F. Beecher, who had recently left the employment ...

in 1919. The ferry was later taken over by the Puget Sound Navigation Company, later sold to the state government in 1951 to form the WSF. The Mukilteo and Whidbey Island highways were added to the state highway system in 1937 as SSH 1D and SSH 1I, both branches of PSH 1. SSH 1D traveled on Whidbey and

Fidalgo ''Fidalgo'' (, ), from Galician and Portuguese —equivalent to nobleman, but sometimes literally translated into English as "son of somebody" or "son of some (important family)"—is a traditional title of Portuguese nobility that refers to a ...

islands from the Clinton ferry dock to an intersection with the

circular arc Circular may refer to: * The shape of a circle * ''Circular'' (album), a 2006 album by Spanish singer Vega * Circular letter (disambiguation) ** Flyer (pamphlet), a form of advertisement * Circular reasoning, a type of logical fallacy * Circula ...

from Everett to Lynnwood, traveling on Mukilteo Boulevard and the Mukilteo Speedway. SR 525 was established during the 1964 state highway renumbering and codified in 1970 as the successor to both SSH 1D and SSH 1I. The highway was extended south and east from Highway 99 to the newly-completed

in February 1965, using 164th Street NE until a new freeway could be constructed. The highway was truncated from Anacortes to its present terminus south of Coupeville after SR 20 was extended across the state on the North Cascades Highway in 1973. SR 525 was re-aligned onto a two-lane freeway between SR 99 and the Swamp Creek in the 1980s, extending the route to

. The Swamp Creek Interchange itself was completed in November 1984. WSF ferry routes were added to its respective state highways in 1994, eliminating one of two gaps along the route of SR 525, the other being a

concurrency Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...

with SR 99 that was replaced by a

in 2000 during the widening of the freeway segment in Lynnwood. A

, located completely in Mukilteo, was added to SR 525 in 2001 along the route of the four-lane Paine Field Boulevard, connecting the main highway to SR 526. The Mukilteo ferry terminal, originally completed in 1957, was replaced by a new facility that opened on December 29, 2020. The new terminal, which includes a waiting area, longer car queues, and a transit center, cost $187 million to construct.

Major intersections

Spur route

SR 525 has a

on Paine Field Boulevard in Mukilteo that connects the northbound lanes of the Mukilteo Speedway to SR 526 eastbound towards Everett and the local Boeing factory. Paine Field Boulevard was built in 1999 and signed as SR 525 Spur in 2001, subsequently being widened and improved in 2003 by WSDOT. A proposal to extend Paine Field Boulevard through

Japanese Gulch Japanese Gulch, is a drainage basin located in Snohomish County, Washington. Within the drainage basin, the City of Mukilteo owns 147 acres of land including a dog park, waterfront access, open space, and a community garden. With its rich histo ...

and create a

bypass Bypass may refer to: * Bypass (road), a road that avoids a built-up area (not to be confused with passing lane) * Flood bypass of a river Science and technology Medicine * Bypass surgery, a class of surgeries including for example: ** Heart bypas ...

of the Mukilteo ferry terminal has been a part of the city's transportation plan since 2001, but has not been built. WSDOT estimated, during its annual

AADT Annual average daily traffic, abbreviated AADT, is a measure used primarily in transportation planning, transportation engineering and retail location selection. Traditionally, it is the total volume of vehicle traffic of a highway or road for a ...

survey, that 21,000 vehicles used the highway in 2012.

References

External links

*
Highways of Washington State
{{good article

525 __NOTOC__ Year 525 ( DXXV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Probus and Philoxenus (or, less frequently, year 1278 '' ...

Transportation in Snohomish County, Washington Transportation in Island County, Washington