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The Downtown Seattle Transit Tunnel (DSTT), also referred to as the Metro Bus Tunnel, is a 1.3-mile-long (2.1 km) pair of public transit tunnels in Seattle, Washington, United States. The double-track tunnel and its four stations serve Link light rail trains on the 1 Line as it travels through Downtown Seattle.
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 route primarily follows arterial streets, including Aurora Avenue, and has several freeway segments, including the tolled SR 99 Tunnel in Downtown Seattle. SR 99 was officially named the William P. Stewart Memorial Highway by the state legislature in 2016, after a campaign to replace an unofficial moniker honoring Confederate president ...
Metro Transit began planning a bus-based transit system through downtown Seattle in the 1970s, including a transit mall, tunnel, or bus terminal in the Westlake area. [19] [20] Metro approved construction of a downtown bus tunnel in 1983, [21] selecting Pine Street and 4th Avenue as the site of one of the stations. [22]
Downtown Seattle S Jackson St, International District, Central District, 31 Ave S, Mount Baker Transit Center Mount Baker 1 Schedule Map: 17 Express Conventional No No No No Sunset Hill 32nd Ave NW, Ballard Downtown Seattle Schedule Map: 21 Local Conventional Yes Yes Yes No Downtown Seattle SODO, West Seattle, 35th Ave SW, High Point, Gatewood
The SR 99 Tunnel is a 2-mile (3.2 km) bored double-decker highway tunnel carrying a section of State Route 99 (SR 99) under Downtown Seattle from SoDo in the south to South Lake Union in the north. Since the 2001 Nisqually earthquake , the replacement of the Alaskan Way Viaduct has been the source of much political controversy demonstrating the ...
The new Metro Regional Connector creates L.A. County's first uninterrupted north-south and east-west train lines. Three new stations downtown are now open.
First use of Earth Pressure Balance Machine in Seattle [1] 1987–1988 Downtown Seattle Transit Tunnel: Twin 21.25 ft (6.48 m) 13,624 ft (4,153 m) Tunnelling shield First use of waterproofing PVC membrane in USA [1] 1990 Fort Lawton Tunnel/West Point Sewer 15.5 ft (4.7 m) O.D. 8,400 feet (2,600 m) Partial Earth Pressure Balance Machine [1] [5] 1993