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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 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 ...
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 ...
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 ...
A combined state department of transportation was proposed in the mid-1960s and gained the support of Governor Dan Evans. [10] Charles Prahl, who resigned as head of the Department of Highways, criticized the Evans administration's proposal to create a transportation "superagency" and the prioritization of rapid transit in plans for the urban transportation system of Seattle. [11]
State Route 20 (SR 20), also known as the North Cascades Highway, is a state highway that traverses the U.S. state of Washington.It is the state's longest highway, traveling 436 miles (702 km) across the northern areas of Washington, from U.S. Route 101 (US 101) at Discovery Bay on the Olympic Peninsula to US 2 near the Idaho state border in Newport.
[7] [9] The highway is maintained by the Washington State Department of Transportation (WSDOT), who conduct an annual survey of traffic volume expressed in terms of annual average daily traffic. Average traffic volumes on the highway in 2016 ranged from a minimum of 950 vehicles near Kalaloch to a maximum of 100,000 vehicles in Olympia. [10]
State Route 281 (SR 281) is a short state highway in Grant County, Washington. It travels north–south for 10.5 miles (16.9 km), connecting Interstate 90 (I-90) in George to SR 28 in Quincy . The highway is a major freight corridor and also has a short spur route near George that connects it to SR 283 .