Contents tagged with sr99

  • + Will the tunnel work for freight?

    The SR 99 tunnel will maintain freight routes through Seattle and preserve I-5 for regional and state freight trips. It will also provide a route through the city for vehicles that would otherwise use city streets.

    Some freight trips destined for Ballard and the Interbay industrial area will likely use the new Alaskan Way street along the waterfront, with its crossing over the railroad tracks to Elliott and Western avenues. Traffic signals along the waterfront will be operated to ensure through trips move efficiently.

    Freight trips leaving Port of Seattle terminals will also have improved access to I-5 and I-90 as a result of SR 519 and Spokane Street improvements and a new overpass at South Atlantic Street, which was included in our south-end viaduct replacement project.


  • + How will northwest Seattle residents get to SR 99?

    Residents from northwest Seattle will have two options to get to or through downtown Seattle. They could travel along Elliott Avenue, as they do today, and drive down a new bridge over the railroad tracks near Pike Place Market to a new Alaskan Way street along the waterfront. Alaskan Way will connect directly to SR 99 near South Royal Brougham Way.

    If northwest Seattle residents want to use the SR 99 tunnel, they could take the new two-way Mercer Street to Sixth Avenue North and enter the tunnel at Republican Street. They could also use any of the existing connections to Aurora Avenue north of Mercer Street. Our Future Access Page shows example routes.


  • + Will there be cost overruns on the tunnel?

    WSDOT actively manages risk and costs on all of its projects. In the case of the tunnel project, one of the most important tools we have is the contract we signed with Seattle Tunnel Partners to design and build the tunnel. A fuller explanation is available here


  • + Will the tunnel be safe?

    Structural engineers agree that tunnels can be one of the safest places to be during an earthquake. The SR 99 tunnel is being designed to withstand an earthquake that only happens every 2,500 years on average (in the range of a magnitude 9.0 earthquake) without collapsing.

    The tunnel will have emergency passages to safe refuge areas, and state-of-the-art ventilation, fire detection and suppression, security and lighting systems. It will be monitored 24 hours a day by WSDOT, similar to the I-90 tunnel today. Check out our tunnel safety fact sheet (pdf 1.6 Mb) for additional information.


  • + Where is the tunnel located?

    The tunnel route begins on Alaskan Way South, south of South King Street, then moves toward First Avenue near Yesler Way, turns north near Stewart Street, and ends at Sixth Avenue North and Thomas Street.