Infrastructure

SR 20, I-5 and I-405 closures announced

Sunday, August 30, 2026

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State Route 20 will close the left lane westbound from March's Point Road to Gibralter Road on Sept. 1 for maintenance. The closure runs from 9 a.m. to 3 p.m. on Tuesday, Sept. 1.

I-5 off-ramps in Fife will close from 2:30 a.m. Aug. 29 to 7 a.m. Aug. 30, with the exit lane remaining closed through August 2027. I-5 will also reduce to one lane nightly near Alger/Lake Samish Road from Aug. 31 to Sept. 4 for fish passage construction.

I-405 will have overnight lane closures on Sept. 3-4 and an extended closure from Aug. 28 to Aug. 31. State Route 4 will close a single lane weekdays until Sept. 11 for gas line work. Drivers should follow detour signs and allow extra time for travel.

📄 Source: WSDOT — Highway Construction & Closures — https://wsdot.wa.gov/travel/road-construction

Source receipts6 of 10 claims supported · 60%

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State Route 20 will close the left lane westbound from March's Point Road to Gibralter Road on Sept. 1“020: From 9 a.m. to 3 p.m. Tuesday, Sept. 1 the left lane of westbound State Route 20 from March's Point Road/Christianson Road to Gibralter Road (milepost 47) will close for maintenance.”
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The closure runs from 9 a.m. to 3 p.m. on Tuesday, Sept. 1“020: From 9 a.m. to 3 p.m. Tuesday, Sept. 1 the left lane of westbound State Route 20 from March's Point Road/Christianson Road to Gibralter Road (milepost 47) will close for maintenance.”
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I-5 off-ramps in Fife will close from 2:30 a.m. Aug. 29 to 7 a.m. Aug. 30“005: From 2:30 a.m. Saturday, Aug. 29 to 7 a.m. Sunday, Aug. 30, <a href="https://fifewa.gov/m/newsflash/home/detail/186">City of Fife</a> will close the northbound I-5 off-ramp to 20th Street East, Exit 136A, in Fife. When the off-ramp reopens, the exit only lane will remain closed. The lane closure is in place through August 2027.”
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The exit lane will remain closed through August 2027“The lane closure is in place through August 2027.”
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I-5 will reduce to one lane nightly near Alger/Lake Samish Road from Aug. 31 to Sept. 4“005: The northbound and southbound I-5 will be reduced to a single lane from 8 p.m. to 5 a.m. nightly Monday, Aug. 31, through Friday morning, Sept. 4, near Alger/Lake Samish Road (exit 240) for fish passage construction.”
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I-405 will have overnight lane closures on Sept. 3-4“405: Up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast (milepost 10) will be closed overnight, 9 p.m. Thursday, Sept. 3 – 5 a.m. Friday, Sept. 4.”
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I-405 will have an extended closure from Aug. 28 to Aug. 31No usable supporting receipt — unverified.
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State Route 4 will close a single lane weekdays until Sept. 11“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”
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Drivers should follow detour signsNo usable supporting receipt — unverified.
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Drivers should allow extra time for travelNo usable supporting receipt — unverified.