UPDATE: Light repairs planned during next Highway 99 tunnel closure – which is now postponed

1:08 PM: WSDOT has announced the next Highway 99 tunnel closure for this Friday night and Saturday morning, and listing what’ll be done while it’s closed:

Both directions of the State Route 99 tunnel in Seattle will close from 10 p.m. Friday, Feb. 7, to 6 a.m. Saturday, Feb. 8, for maintenance.

Washington State Department of Transportation will start closing northbound and southbound lanes at 9 p.m., with the tunnel fully closed by 10 p.m. Drivers going south on SR 99 will need to take the Harrison Street off-ramp, and northbound SR 99 drivers will need to take the Alaskan Way off-ramp. Also, the Sixth Avenue and Royal Brougham Way on-ramps will close at 9 p.m.

The closure will let crews do several important tasks, including:

-Fire suppression testing.
-Cleaning and marking drains.
-Fixing lights.

People traveling through downtown Seattle Friday night should use alternate routes

The topic of nonfunctioning lights on 99 by the tunnel came up in a recent comment discussion, so we’re checking with WSDOT on specifics.

3:41 PM: WSDOT hasn’t replied to our inquiry yet, but has just announced that this closure is postponed “to a later date.”

2 Replies to "UPDATE: Light repairs planned during next Highway 99 tunnel closure - which is now postponed"

  • David February 4, 2025 (9:41 pm)

    Are they finally going to clean out the graffiti?Don’t they have cameras in that tunnel monitoring it? Not sure how that keeps happening. Probably just a couple people but it’s annoying.

  • OP February 5, 2025 (12:53 pm)

    100% agreed, David. Use the opportunity to get rid of the unsightly graffiti.

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