 The westernmost section of SR 528 between I-5 and SR 528 is designated as a minor route of the National Highway System.Marysville was established in 1878 and platted in 1885, including 4th Street as one of its principal streets.Initially, the only bridge across Allen Creek connected 3rd Street with Sunnyside Boulevard, forming part of the Pacific Highway until the completion of bridges over the Snohomish River in 1927.