Date: April 21, 2026 to April 30, 2026

Time: 10 p.m. to 6 a.m. nightly (excluding weekends)

Activity details:

Impact type:

Description: Crews will use these closures to prepare for an upcoming traffic shift of the off-ramp scheduled for later this spring. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project.

Traffic: The eastbound SR 520 off-ramp to Montlake Blvd. in Seattle will close nightly for construction beginning at 10 p.m. until 6 a.m. on the dates of April 21-23 and 27-30.

All traffic from I-5 entering eastbound SR 520 during these hours will pay the SR 520 Bridge Toll with this ramp closed. Those who do not want to pay the toll or who need to access Montlake Blvd. from I-5 must take alternate routes.

Eastbound SR 520 remains open across Lake Washington.

Date: 04/20/2026 to 04/23/2026

Time: 11 p.m. to 6 a.m. the next morning

Activity details:

Impact type:

Crews will fully close Boylston Avenue East between East Roanoke Street and East Louisa Street in both directions on the nights of Monday, April 20, Tuesday, April 21 and Wednesday, April 22 for utility work.

Date: April 25, 2026 to April 26, 2026

Time: 9 p.m. Saturday to 9 a.m. Sunday

Activity details:

Impact type:

Description: Crews will use this closure to temporary relocate utilities across the mainlines. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project.

Traffic: Both directions of SR 520 between Montlake Boulevard and I-5 in Seattle will close for construction beginning at 9 p.m. on Saturday, April 25, until 9 a.m. on Sunday, April 26.

During this time all westbound SR 520 traffic coming across Lake Washington will exit at either Montlake or Lake Washington Boulevards. Traffic from I-5 wanting to access eastbound SR 520 must use alternate routes. SR 520 and the SR 520 Trail remains open across Lake Washington. It is only the section of SR 520 between Montlake and I-5 that will close.