Infrastructure

I-405, I-5 and I-90 Work Continues Through Labor Day

Wednesday, September 2, 2026

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WSDOT has announced multiple highway closures in Vancouver, WA, effective through Friday, Sept. 4. The closures include overnight restrictions on I-405 southbound from milepost 12 to Coal Creek Parkway (Sept. 3-4), I-405 northbound from milepost 7 to 8.5 (Aug. 31-Sept. 4), and I-90 eastbound off-ramp to Factoria Boulevard (Aug. 31-Sept. 4). The closures also include I-5 northbound lane reductions near Alger/Lake Samish Road (exit 240) and a single lane closure on SR 4 between 50th and 42nd Avenues (Aug. 17-Sept. 11). WSDOT states these closures are for fish passage construction, utility work, and gas main line extensions. Residents should expect traffic delays during overnight hours, with detours in place for some closures. The I-5 fish passage project will continue until Sept. 10, while most other closures end Sept. 4.

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

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WSDOT has announced multiple highway closures in Vancouver, WANo usable supporting receipt — unverified.
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The closures are effective through Friday, Sept. 4“Effective: Aug 31, 2026, 9:00 PM Expected end: Sep 4, 2026, 4:30 AM”
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The closures include overnight restrictions on I-405 southbound from milepost 12 to Coal Creek Parkway“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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The overnight restrictions on I-405 southbound are from Sept. 3 to Sept. 4No usable supporting receipt — unverified.
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The closures include I-405 northbound from milepost 7 to 8.5“405: Up to two lanes of northbound I-405 from milepost 7 to milepost 8.5 will be closed nightly, 9 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
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The I-405 northbound closure is from Aug. 31 to Sept. 4“405: Up to two lanes of northbound I-405 from milepost 7 to milepost 8.5 will be closed nightly, 9 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
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The closures include I-90 eastbound off-ramp to Factoria Boulevard“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
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The I-90 eastbound off-ramp closure is from Aug. 31 to Sept. 4“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4.”
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The closures also include I-5 northbound lane reductions near Alger/Lake Samish RoadNo usable supporting receipt — unverified.
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The I-5 northbound lane reductions are near exit 240“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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The closures also include a single lane closure on SR 4 between 50th and 42nd AvenuesNo usable supporting receipt — unverified.
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The SR 4 single lane closure is from Aug. 17 to 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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WSDOT states these closures are for fish passage constructionNo usable supporting receipt — unverified.
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WSDOT states these closures are for utility workNo usable supporting receipt — unverified.
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WSDOT states these closures are for gas main line extensionsNo usable supporting receipt — unverified.
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Residents should expect traffic delays during overnight hoursNo usable supporting receipt — unverified.
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Detours are in place for some closures“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
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The I-5 fish passage project will continue until Sept. 10“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. More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/i-5-tributaries-friday-lake-chuckanut-creeks-fish-passage">project webpage</a>. Effective: Aug 14, 2026, 12:55 PM Expected end: Sep 10, 2026, 5:00 AM 005: The left lane of northbound I-5 will close from 8 p.m. to 5 a.m. nightly Sunday, Aug. 30, through Friday morning, Sept. 4, north of North Lake Samish (exit 246) for fish passage construction. More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/i-5-tributaries-friday-lake-chuckanut-creeks-fish-passage">project webpage</a>. Effective: Aug 14, 2026, 12:49 PM Expected end: Sep 4, 2026, 5:00 AM ”
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Most other closures end Sept. 4No usable supporting receipt — unverified.