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A map of PSH 5 and its branches. After US 12 was extended through Washington in 1967, SR 410 used the Sumner–Buckley branch as well as the main highway to Naches for its route. In 1923, the state highway system was restructured completely, incorporating numbers instead of names.
Follows US 12 through White Pass; also designated as a National Forest Scenic Byway [20] Yakima Scenic Byway: 76 122 SR 14 in Maryhill: I-82/US 12 in Union Gap: Follows US 97 through the Yakama Indian Reservation: Yakima River Canyon Scenic Byway: 18 29 I-82 in Selah: I-82 in Ellensburg: Follows SR 821 through the Yakima River Canyon [21]
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 ...
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 stretch of I-5 through Downtown Seattle is the busiest highway in Washington state, with a daily average of over 274,000 vehicles in the mainline and express lanes. [16] The least-traveled segment of I-5 is located at SR 548 in Blaine , with a daily average of 6,600 vehicles. [ 17 ]
It crosses Washington state from west to east, traveling 298 miles (480 km) from Seattle across the Cascade Mountains and into Eastern Washington, reaching the Idaho state line east of Spokane. I-90 intersects several of the state's other major highways, including I-5 in Seattle, I-82 and U.S. Route 97 (US 97) near Ellensburg , and US 395 and ...
The state of Washington began maintaining sections of what would become US 2 with the extension of State Road 7 in 1909, from Peshastin to Spokane on the Sunset Highway and later State Road 2. In addition to State Road 2, State Road 23 was created in 1915, traveling north from Spokane to Newport, and was renumbered to State Road 6 in 1923
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).