Expect delays: Seattle's SR 99 tunnel, Montlake Boulevard interchange to close this weekend
Seattle drivers should expect delays staring Friday as several major thoroughfares are scheduled to be closed through the weekend.
All ramps that connect Highway 520 and Montlake Boulevard will close from 10 p.m. on Friday to 5 a.m. on Monday so crews can install sewer, communications and gas lines in the area. Parts of Lake Washington and Montlake boulevards near the construction site will also be closed during that window.
The Montlake Bridge will be closed to vehicles from Friday night to early Monday morning. The west sidewalk will remain open while repairs are made. Bicycles and pedestrians should follow signs for detours at Northeast Pacific Street or East Shelby Street to cross the Montlake Cut.
Additionally, the Highway 99 tunnel will be closed in both directions from 10 p.m. Friday to 8 a.m. Sunday. Crews there will be performing regularly scheduled maintenance.
https://www.seattlepi.com/local/transportation/article/highway-99-tunnel-and-montlake-boulevard-closures-16520535.php
In case you weren't aware of this already.