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Washington us 10

Motorists in Washington state would have seen this sign along present day Interstate 90 from 1926 to 1947. Unlike Highway 99, Highway 10 no longer goes to Seattle. It was shortened in 1969 after I-90 finished construction in Washignton state (Created using the Shield Generator at AARoads.com).

Highway 10, U.S. Route 10 or State Route 10, was a major interstate highway that existed in Seattle from 1926 to 1969. Today, U.S. Route 10 still exists, but ends in North Dakota. A portion of U.S. Route 10 exists as State Route 10 between Cle Ellum and Ellensburg in Washington state. U.S. Route 10 had a child route which mostly existed in Washington State called U.S. Route 410. At one point, U.S. Route 410 was planned to extend into downtown Seattle along U.S. Route 10's older routing, but no evidence exists showing U.S. Route 410 being re-routed along that corridor at any point in its lifetime.

Seattle was U.S. Route 10's eastern terminus until 1969. It entered Seattle via the Lacey V. Murrow Memorial Bridge (which now carries eastbound Interstate 90) and became the long since scrapped Lakeway Expressway. Lake Way ended at Rainier Avenue and U.S. Route 10 followed it north to Dearborn Street, which carried U.S. Route 10 to Airport Way (now Seattle Boulevard) which U.S. Route 10 followed north and ended at Fourth Avenue (which was then U.S. Route 99). After 1969, Lake Way and U.S. Route 10 were replaced by Interstate 90, which ends at State Route 519 (Edgar Martinez Drive) next to Safeco Field.

The earlier routing of U.S. Route 10 followed Rainier Avenue and Martin Luther King Jr. Boulevard out of Seattle and went around Lake Washington through Renton. Today State Route 900 uses much of this routing. In 1940, the new Lakeway Expressway was built between Issaquah and Rainier Avenue in Seattle which included the Lacey V. Murrow Memorial Bridge. U.S. Route 10 now had a more direct routing into Seattle which attracted tourism due to the floating bridge segment. Today, pieces of Lakeway are still visible from Interstate 90, including part of the original tunnel in eastern Seattle and segments of the Lacey V. Murrow Memorial Bridge.

U.S. Routes 99, 10 and 410 were the only three U.S. Highways that either existed or were planned to exist within Seattle's city limits.

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