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Infrastructure

I-405 and SR 20 Work Causes Traffic Shifts

πŸ”Š Listen Β· narrated by Aiden

Up to three lanes of northbound I-405 will close from Northeast 85th Street to Northeast 100th Street from 11 p.m. Friday, Aug. 28, to 4 a.m. Monday, Aug. 31, with a detour in place. The HOV lane on southbound I-405 will close nightly from 9:30 p.m. Monday, Aug. 24, to 5 a.m. Friday, Aug. 28.

SR 20 near Loup Loup Pass will see alternating, one-lane, two-way traffic Mondays through Thursdays from 6 a.m. to 8 p.m. until Aug. 27, with reduced speeds and temporary rumble strips. SR 9 will remain reduced to a single lane near Kalloch Road until Sept. 14 for fish passage construction, with alternating traffic through a bypass road.

The WSDOT project webpage provides details on the SR 9 fish passage work, which is scheduled to continue through Sept. 14. Drivers should expect delays in all affected areas.

πŸ“„ Source: WSDOT β€” Highway Construction & Closures β€” https://wsdot.wa.gov/travel/road-construction
Source receipts17 of 20 claims supported Β· 85%

Legacy automated check: the original source text was not preserved. These earlier verdicts have not passed the current publication checks and may contain errors. Source: original document β†—

  • βœ“
    Up to three lanes of northbound I-405 will close from Northeast 85th Street to Northeast 100th Streetβ€œ405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
  • βœ“
    The closure of northbound I-405 will start at 11 p.m. Friday, Aug. 28β€œ405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
  • βœ“
    The closure of northbound I-405 will end at 4 a.m. Monday, Aug. 31β€œ405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
  • βœ“
    A detour will be in place during the closure of northbound I-405β€œA signed detour will be in place.”
  • βœ“
    The HOV lane on southbound I-405 will close nightlyβ€œ405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
  • βœ“
    The closure of the HOV lane on southbound I-405 will start on Monday, Aug. 24β€œ405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
  • ⚠
    The closure of the HOV lane on southbound I-405 will end on Friday, Aug. 28No usable supporting receipt β€” unverified.
  • βœ“
    SR 20 near Loup Loup Pass will see alternating, one-lane, two-way trafficβ€œ020: Travelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27. Expect alternating, one-lane, two-way traffic, automatic flaggers, temporary rumble strips and reduced speed limits.”
  • βœ“
    The alternating traffic on SR 20 near Loup Loup Pass will occur Mondays through Thursdaysβ€œ020: Travelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27.”
  • βœ“
    The alternating traffic on SR 20 near Loup Loup Pass will be from 6 a.m. to 8 p.m.β€œ020: Travelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27. Expect alternating, one-lane, two-way traffic, automatic flaggers, temporary rumble strips and reduced speed limits.”
  • βœ“
    The alternating traffic on SR 20 near Loup Loup Pass will continue until Aug. 27β€œ020: Travelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27. Expect alternating, one-lane, two-way traffic, automatic flaggers, temporary rumble strips and reduced speed limits.”
  • βœ“
    The traffic on SR 20 near Loup Loup Pass will have reduced speedsβ€œTravelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27. Expect alternating, one-lane, two-way traffic, automatic flaggers, temporary rumble strips and reduced speed limits.”
  • βœ“
    The traffic on SR 20 near Loup Loup Pass will have temporary rumble stripsβ€œTravelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27. Expect alternating, one-lane, two-way traffic, automatic flaggers, temporary rumble strips and reduced speed limits.”
  • ⚠
    SR 9 will remain reduced to a single lane near Kalloch RoadNo usable supporting receipt β€” unverified.
  • βœ“
    The reduction of SR 9 to a single lane near Kalloch Road will continue until Sept. 14β€œ009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction. More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/sr-9-unnamed-tributaries-nookachamps-hansen-creeks-fish-passage">project webpage</a>. Effective: Aug 3, 2026, 9:02 AM Expected end: Sep 14, 2026, 8:00 AM”
  • βœ“
    The reduction of SR 9 to a single lane near Kalloch Road is for fish passage constructionβ€œ009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction.”
  • βœ“
    Alternating traffic through a bypass road will be in place on SR 9 near Kalloch Roadβ€œ009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction. Expect delays in the area.”
  • βœ“
    The WSDOT project webpage provides details on the SR 9 fish passage workβ€œMore information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/sr-9-unnamed-tributaries-nookachamps-hansen-creeks-fish-passage">project webpage</a>.”
  • βœ“
    The SR 9 fish passage work is scheduled to continue through Sept. 14β€œ009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction. Expect delays in the area.”
  • ⚠
    Drivers should expect delays in all affected areasNo usable supporting receipt β€” unverified.

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