Highway System Plan

The following links take you to the Highway System Plan Congested Corridor Segment Reports, categorized by non-interstate and interstate:

Non Interstate (List)

Non Interstate (Map)

Interstate

• I-90 Corridor (Eastern Region) (pdf 3.3 mb)
  
• I-5 US12 to SR121 Interchange (Olympic Region) (pdf 6.2 mb)
  Also includes Martin Way Interchange to Nisqually Interchange Vicinities)
• I-182 from I-82 to US395 (South Central Region) (pdf 3.9 mb)
  Also includes I-82: SR823 to US97, and I-90: Cabin Creek to Cle Elum/SR 970)
• I-5 from  Columbia River to SR 500 (Southwest Region) (pdf 4 mb)
  Also includes: I-5: SR 500 to Dike St., Toutle Rest Area to Exit 88A, and I-205: Columbia River to SR 500 to I-5)
  
• I-5 Nisqually to Tacoma (Urban Planning)  (pdf 22 mb)
  Also includes: I-5 to I-405 and King/Snohomish County Line to US 2 to Snohomish/Skagit County Line, and I-90: I-5 to I-405 at Factoria, to Sunset Way in Issaquah, to Northwest Region Boundary, and I-405: I-5 at Tukwila to I-90, I-90 to I-5 in Lynnwood, and I-705: I-5 to Shuster Parkway Vicinity)
• I-5 Northbound, Stilliguamish River-International Boundary (pdf 7 mb)