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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 right lane of travel near the truck scales is shut down, WSDOT said. The non-injury crash, reported at 3:30 p.m., is at milepost 9.7, near 36th Street. Westbound traffic is slow from the scene ...
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
The Washington State Department of Transportation (WSDOT or WashDOT, both / ˈ w ɒ ʃ d ɒ t /) is a governmental agency that constructs, maintains, and regulates the use of transportation infrastructure in the U.S. state of Washington. Established in 1905, it is led by a secretary and overseen by the governor.
WSDOT efforts Statewide, 772 people were killed in crashes last year, up from 745 people in 2022 — the most in three decades. Total crashes, however, fell to a 10-year low of 78,116, which was ...
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The preferred alternative for the bridge's design, with four general-purpose lanes and two HOV lanes, was announced by WSDOT in April 2010. [12] Alternative options included the construction of a southbound onramp from the I-5 express lanes , the addition of light rail to the project, and an eight-lane bridge.
The Washington State Department of Transportation (WSDOT) estimates that average traffic volumes on SR 99, measured in terms of annual average daily traffic for 2016, range from a minimum of 17,000 vehicles on Everett Mall Way to a maximum of 97,000 at the First Avenue South Bridge in Seattle.