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Spokane Street Viaduct Widening

The Seattle Department of Transportation (SDOT) is widened and improved the South Spokane Street Viaduct---the 60-year-old elevated roadway that carries more than 70,000 vehicles daily between I-5 and the West Seattle Bridge.

The South Spokane Street project provided these benefits:

  • created a new two-lane eastbound off-ramp leading to Fourth Avenue South;
  • relocated the westbound on- and off- ramps to a new First Avenue South ramp;
  • widened the upper roadway to the north by 41 feet - between Sixth Avenue South and East Marginal Way;
  • rebuilt the lower roadway in concrete, with new curbs, sidewalks and improved pedestrian and bicycle access.

The project was completed in 2012. The Port of Seattle is contributed $3.4 million to the City of Seattle for this construction.​

Learn more about it at

Spokane Street