SR 534 begins at an interchange with I-5 in Conway, located near the mouth of the Skagit River east of Fir Island. The highway is a continuation of the Pioneer Highway, which travels south from Conway to Stanwood. SR 534 travels east and passes an elementary school before it ascends from the Skagit Valley into hilly terrain.[3] The highway travels southeast and reaches its eastern terminus at SR 9 in Lake McMurray.[4][5]
The two-lane rural highway primarily serves as a short connector between I-5 and SR 9.[3] SR 534 is maintained by the Washington State Department of Transportation (WSDOT), which conducts an annual survey of traffic volume that is expressed in terms of annual average daily traffic. Average traffic volumes on the highway in 2016 ranged from a minimum of 1,300 vehicles at SR 9 in Lake McMurray to a maximum of 8,300 vehicles at the I-5 interchange.[6]
The highway's western terminus in Conway was originally an intersection where several fatal collisions occurred during the 1960s.[9] Plans to replace the intersection with a grade-separated interchange were published by the state government in 1968 as part of improvements to I-5 to bring it to Interstate Highway standards.[10] Construction began in July 1969 and was expected to be completed within two years, but was delayed due to difficulty working with the soil over the winter months.[11] SR 534 was relocated to a new overpass at the completed interchange in 1971.[12]
^2016 Annual Traffic Report(PDF) (Report). Washington State Department of Transportation. 2017. p. 208. Archived from the original(PDF) on February 8, 2020. Retrieved March 24, 2023.
^ abWashington State Legislature (March 18, 1937). "Chapter 207: Classification of Public Highways". Session Laws of the State of Washington (1937 ed.). Olympia, Washington: Washington State Legislature. pp. 995–996. Retrieved June 9, 2009. (h) Secondary State Highway No. 1H; beginning at Conway on Primary State Highway No. 1, thence in a southeasterly direction by the most feasible route to McMurray on Secondary State Highway No. 1A.
^"The People of Interstate 5". Washington Highway News. Vol. 23, no. 1. Washington State Department of Highways. February 1972. p. 19. OCLC29654162. Retrieved September 12, 2018 – via WSDOT Library Digital Collections.