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The highway is a remnant of U.S. Route 10 (US 10) in Kittitas County, traveling southeast along the Yakima River from SR 970 in Teanaway to US 97 northwest of Ellensburg. SR 10 was established in 1970 as the successor to US 10 after the completion of I-90 across the Snoqualmie Pass in 1968. The highway was previously part of State Road 3 from ...
The system spans 8.5% of the state's public road mileage, but carries over half of the traffic. [2] [3] All other public roads in the state are either inside incorporated places (cities or towns) or are maintained by the county. [4] The state highway symbol is a white silhouette of George Washington's head (whom the state is named after).
The United States Numbered Highway System in Washington covers 1,870 miles (3,009.5 km) and consists of eight highways, divided into four primary routes and four auxiliary routes. The United States Numbered Highway System was approved and established on November 11, 1926 by the American Association of State Highway Officials (AASHO) and ...
The U.S. state of Washington has over 7,000 miles (11,000 km) of state highways maintained by the Washington State Department of Transportation (WSDOT). [1] The highway system is defined through acts by the state legislature and is encoded in the Revised Code of Washington as State Routes (SR).
The Interstate Highways in Washington are segments of the national Interstate Highway System that lie within the U.S. state of Washington.The system comprises 764 miles (1,230 km) on seven routes that are owned and maintained by the Washington State Department of Transportation (WSDOT); the design standards and numbering across the national system are managed by the Federal Highway ...
US 10A split from US 10 in Seattle. The highway would then follow US 99 (modern Washington State Route 99) north to Everett. There it separated from US 99. It then traveled east across the Cascade Range via Stevens Pass to central Washington. In Spokane, the highway followed US 195 to Sandpoint, Idaho.
In 1905, the road became known as State Road 1 and was incorporated into the first state highway system. [26] By 1907, the road was named the White River – Natches Road and was shortened to end at Cedar Springs. The rest of the road was transferred to State Road 5, called the Cowlitz–Natches Road, which ran from Napavine to Naches. [27]
The wagon road was designated as State Road 10 (later the Lake Chelan and Okanogan Highway) and was completely paved by the late 1930s. US 97 was created in 1926 and followed the highway, which was relocated in the 1950s due to the construction of the Rocky Reach Dam.