Rainier Avenue South Phase 4

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Rainier Avenue South is a critical regional transit corridor. It manages high transit use and pedestrian and cyclist traffic volumes daily. The project improves overall functionality to support traffic demands, enhance walkability, and provide transit access without impacting traffic flow. A project at this scale requires a phased approach over several years, with the primary challenge being securing funding.

When grant funding was awarded to the projects, the city could take action on Phase 4 of Rainier, which focuses on safety, improving traffic flow, and access.

Safety for walkers and bicyclists with wider sidewalks and new bike lanes. Safety for drivers trying to get in and out of businesses. Access for transit, walkers, and bicyclists to make stops or access businesses without resulting in traffic delays or collisions.

After Phase 4, expect to see:

  • Sidewalk widening with streetscaping
  • Pedestrian-scale lighting
  • Extension of the Lake Washington Loop Trail
  • Pedestrian-activated traffic signals
  • Upgrading existing traffic signals
  • Transit improvements, including an extended Business Access and Transit lane (BAT lane)
  • Planted buffer strips and landscaped medians

Rainier Avenue South is a critical regional transit corridor. It manages high transit use and pedestrian and cyclist traffic volumes daily. The project improves overall functionality to support traffic demands, enhance walkability, and provide transit access without impacting traffic flow. A project at this scale requires a phased approach over several years, with the primary challenge being securing funding.

When grant funding was awarded to the projects, the city could take action on Phase 4 of Rainier, which focuses on safety, improving traffic flow, and access.

Safety for walkers and bicyclists with wider sidewalks and new bike lanes. Safety for drivers trying to get in and out of businesses. Access for transit, walkers, and bicyclists to make stops or access businesses without resulting in traffic delays or collisions.

After Phase 4, expect to see:

  • Sidewalk widening with streetscaping
  • Pedestrian-scale lighting
  • Extension of the Lake Washington Loop Trail
  • Pedestrian-activated traffic signals
  • Upgrading existing traffic signals
  • Transit improvements, including an extended Business Access and Transit lane (BAT lane)
  • Planted buffer strips and landscaped medians
Page last updated: 26 Jun 2025, 09:29 AM