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Washington State Department of Transportation
Olympic Region – P.O. Box 47440 – Olympia, WA 98504-7440 – 360-357-2600
TRAVEL ADVISORY
Sept. 14, 2026
Weekday lane closure on southbound I-5 near Grand Mound Monday, Sept. 21
GRAND MOUND– Daytime travelers who use southbound Interstate 5 between Grand Mound and Centralia will see a weekday lane closure.
From 9 a.m. to 3 p.m. Monday, Sept. 21, the right lane of southbound I-5 will close south of Grand Mound near milepost 88. The lane closure creates a work zone for Washington State Department of Transportation crews to repair guardrail.
The ramp from US 12 to southbound I-5 will remain open throughout the work.
Repairs are scheduled outside of commute hours to help minimize disruptions to travelers.
Whenever near work zones please:
- Slow down – drive the posted speeds, they're there for everyone’s safety.
- Be kind – workers are out there helping to keep everyone safe and improve the roadways.
- Pay attention – both to workers directing traffic and to fellow travelers.
- Stay calm – expect delays, leave early or take alternate routes if possible.
Travelers are encouraged to sign up for email updates about work on state roads in Thurston County. Real-time travel information is available from the WSDOT app and statewide travel map.
Hyperlinks within the release:
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WSDOT keeps people, businesses and the economy moving by operating and improving the state's transportation systems. To learn more about what we're doing, go to wsdot.wa.gov/news for pictures, videos, news and blogs. Real-time traffic information is available at wsdot.com/traffic.
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