State Route 523 (SR 523, named 145th Street) is a short Washington state highway located on the city limits of

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 ...

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 ...

, and Lake Forest Park in King County. The road itself runs east from past (I-5) and ends at ; the highway was first established in 1991, but the roadway from I-5 to 5th Avenue Northeast was once the northern section of from 1937 until 1964 and later from 1964 until 1991.

Route description

State Route 523 (SR 523) begins at an intersection with and North 145th Street at the northern

and southern

city limits; at the SR 99 intersection, the highway is named 145th Street. From its western terminus, the roadway travels east to 1st Avenue NE, where SR 523 becomes Northeast 145th Street, which the road keeps until its eastern terminus. The highway travels east to interchange with (I-5), where the northbound ramps are accessed through nearby 5th Avenue Northeast. After the I-5 interchange, the road forms the northern boundary of the Jackson Park Golf Course and later continues to at the northern Seattle, southern Shoreline and western Lake Forest Park city limits. The SR 523 / I-5 interchange was used by an estimated 28,000 motorists daily based on

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) data collected by 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 ...

History

145th Street was paved by the King County government between 1934 and 1935. The Washington State Legislature first established a state-maintained highway on a section of present-day SR 523 in 1937, with the establishment of (SSH 1J), which ran from Downtown

to (PSH 1) in North Seattle, via the current long section of SR 523 from I-5 to 5th Avenue Northeast. During the 1964 highway renumbering, SSH 1J became and PSH 1 became I-5; the northern terminus of SR 513 became the current SR 523 / I-5 interchange. In 1991, the northern terminus of SR 513 was moved south to its current location,

Magnuson Park Magnuson Park is a park in the Sand Point neighborhood of Seattle, Washington, United States. At it is the second-largest park in Seattle, after Discovery Park in Magnolia (which covers ). Magnuson Park is located at the site of the former N ...

and SR 523 was established.

Major intersections

References

External links

Highways of Washington State
{{State highways in Washington related to I-5

523 __NOTOC__ Year 523 ( DXXIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Maximus without colleague (or, less frequently, year 127 ...

Transportation in King County, Washington Transportation in Seattle