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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.
The State Route 99 tunnel, also known as the Alaskan Way Viaduct replacement tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States.The 2-mile (3.2 km), double-decker tunnel carries a section of State Route 99 (SR 99) under Downtown Seattle from SoDo in the south to South Lake Union in the north.
The Alaskan Way Viaduct ("the viaduct" for short) [1] [2] [3] was an elevated freeway in Seattle, Washington, United States, that carried a section of State Route 99 (SR 99). The double-decked freeway ran north–south along the city's waterfront for 2.2 miles (3.5 km), east of Alaskan Way and Elliott Bay, and traveled between the West Seattle Freeway in SoDo and the Battery Street Tunnel in ...
Today, this older route is Washington State Route 11. [citation needed] Beginning in 1952, the other US Route 99 Alternate began in downtown Bellingham and went due north along the Guide Meridian to Lynden and then to Canada. [10] This highway was decommissioned in 1969 and is today known as Washington State Route 539. [11]
Prior to the construction of Interstate 5 in Washington, the viaduct was separated from the bridge by the main north–south corridor: U.S. Route 99 in Washington. By the 1970s, the West Spokane Street Bridge was one of Seattle's worst bottlenecks, due to the large number of ships in Duwamish Waterway and the frequent bridge openings.
Following a month of maintenance and inspections, Bertha resumed tunneling on Friday, April 29, 2016, [4] and crossed 15 feet (4.6 m) under the closed viaduct in an 11-day closure in early May that ended earlier than scheduled. [61] In June 2016, the tunnel reached its lowest point, 115 feet (35 m) under Madison Street in downtown. [62]
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 state's Interstate and U.S. Highways are also defined as part of the state route system, but are omitted from this list.
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 ...