Four Major Highways Closed in Western Washington This Weekend
Four major highways in western Washington— I‑5, I‑405, SR 520 and SR 99—will be closed from October 3 to October 4, 2026, as part of planned roadwork.
GMNA Seattle
Four primary routes—Interstate 5, Interstate 405, State Route 520 and State Route 99—will be shut down for the weekend of October 3‑4, 2026, affecting drivers across western Washington.
The closures are part of scheduled roadwork targeting key corridors in the region and will remain in effect from Saturday through Sunday.
