We began construction to replace the southern mile of the Alaskan Way Viaduct in 2009. The new roadway, with two side-by-side bridges, will meet current earthquake design standards, have wider lanes and improve mobility for people and goods in the south of downtown Seattle area. It is expected to be complete in 2013.
This project connects to the existing viaduct along the downtown waterfront. Once the SR 99 tunnel is built, the two projects will be permanently connected and drivers will enjoy the benefits of a new SR 99 in Seattle. This project includes:
- Three lanes on SR 99 in each direction, with wider lanes and shoulders.
- On- and off-ramp detours near the stadiums.
- An overcrossing of the railroad tracks at South Atlantic Street.
- New bicycle and pedestrian paths.
- New and rebuilt city streets.
- SR 99 construction bypass.
- Relocated railroad track.
- Connection to existing viaduct at South King Street.
A simulation of the final roadway, which includes a new bridge at South Atlantic Street.
