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State Route 99 (SR 99), also known as the Pacific Highway, is a state highway in the Seattle metropolitan area, part of the U.S. state of Washington. It runs 49 miles (79 km) from Fife to Everett , passing through the cities of Federal Way , SeaTac , Seattle , Shoreline , and Lynnwood .
All state highways are designated by the Washington State Legislature and codified in the Revised Code of Washington (RCW), namely Chapter 47.17 RCW. These routes are defined generally by termini and points along the route; WSDOT may otherwise choose the details, and may bypass the designated points as long as the road serves the general vicinity.
The highway system is defined through acts by the state legislature and is encoded in the Revised Code of Washington as State Routes (SR). It was created in 1964 to replace an earlier numbering scheme and ratified by the state legislature in 1970. The system's 196 highways are almost entirely paved, with the exception of a gravel section on SR 165.
The United States Numbered Highway System was approved and established on November 11, 1926 by the American Association of State Highway Officials (AASHO) and included eleven routes traveling through Washington. [1] [3] In 1961, the state introduced a set of route markers in Olympia that were colored based on destination and direction rather ...
SR 900 was created in the 1964 state highway renumbering, but the corridor had been part of the state highway system since 1909. It was originally a section of the Sunset Highway, the main cross-state route between Seattle and Spokane and was designated as U.S. Route 10 (US 10) in 1926.
The highway is the primary route for Seattle-area residents to access Stevens Pass and other parts of the Cascade Mountains. [21] SR 522 is maintained by the Washington State Department of Transportation (WSDOT), which conducts an annual survey on the state's highways to measure traffic volume in terms of annual average daily traffic. In 2016 ...
State Route 520 (SR 520) is a state highway and freeway in the Seattle metropolitan area, part of the U.S. state of Washington. It runs 13 miles (21 km) from Seattle in the west to Redmond in the east. The freeway connects Seattle to the Eastside region of King County via the Evergreen Point Floating Bridge on Lake Washington.
List of Auxiliary Interstate Highways in Washington Number Length (mi) [1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes I-182: 15.19: 24.45 I-82 / US 12 near Richland: US 12 in Pasco: 1969 [41] current I-182 is a spur that serves the Tri-Cities area and was completed in 1986. [42] I-205: 10.57: 17.01