However, Metro cancelled involvement after delays made the new facility unlikely to be completed before the demolition of the Alaskan Way Viaduct began.

It is mostly a surface-level highway with the exception of the Alaskan Way Viaduct through downtown Seattle.

State Route 99 is also a major arterial in the western half of the city and includes the Alaskan Way Viaduct along the Seattle waterfront.

Proposed replacement of the Alaskan Way Viaduct, Seattle, Washington.

In addition, Seattle is now considering removal of the Alaskan Way Viaduct along the downtown waterfront.

State Route 99 runs through downtown Seattle on the Alaskan Way Viaduct, which was built in 1953.

Since 2001, the proposed replacement of the Alaskan Way Viaduct has been the source of much political consternation demonstrating the Seattle process.

The Proposed replacement of the Alaskan Way Viaduct and a tax on plastic bags at grocery stores were two key issues of the campaign.

In 1953, the elevated Alaskan Way Viaduct was built along the harbor and it discouraged downtown waterfront redevelopment.

On the Alaskan Way Viaduct, near its southern terminus, there are ghost ramps on the east side of the structure.