‘Monster closures’ of SR 520, Montlake Boulevard start this weekend

SEATTLE, CLYDE HILL, MERCER ISLAND, Wash. — Transportation officials are warning drivers about what they are calling “monster closures” of State Route 520 and Montlake Boulevard for construction projects.

The closures are part of the SR 520 Montlake Project.

Eastbound Interstate 90 will also be closed overnight one day this weekend.

The closures are expected to jam traffic and cause backups.

Here’s what you need to know.

Overnight closure of eastbound I-90 from late Friday, July 14, to Saturday morning, July 15

Eastbound Interstate 90 will be closed from Seattle to Mercer Island from 11:59 p.m. on Friday, July 14, to 7 a.m. on Saturday, July 15. The closure for scheduled tunnel maintenance will run from the Rainier Avenue South exit to the Mercer Island Lid Tunnel. One lane of eastbound SR 520 will be open during the closure.

Weekend closures of SR 520, July 14 to 17 and July 21 to 24

Starting at 11 p.m. on July 14, all lanes of westbound SR 520 and one lane of eastbound I-90 will close between 92nd Avenue Northeast in Clyde Hill and Interstate 5 in Seattle.

Then at 9 a.m. on Saturday, July 15, the other lane of eastbound SR 520 will close for the remainder of the weekend.

Both directions will reopen at 5 a.m. Monday, July 17.

The following weekend, all lanes of SR 520 will close again in the same location from 11 p.m. Friday, July 21, to 5 a.m. Monday, July 24.

Montlake Boulevard July 14 to 24

To make matters worse, Montlake Boulevard will be fully closed to traffic for ten days starting at 10 p.m. on Friday, July 14 until Monday, July 24.

The closure is between East Hamlin Street and East Louisa Street. There will still be access for pedestrians and cyclists.

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