Eastbound SR 520 closed between I-5 and Montlake Blvd. in Seattle May 8-11

Date: May 8, 2026 to May 11, 2026

Time: 11 p.m. Friday to 5 a.m. Monday

Activity details:

Partial highway closureRamp closureHigh-impact construction

Impact type:

Around-the-clockTrafficNoise

Description: Crews will use this closure to finalize a traffic shift of the northbound I-5 ramp to eastbound SR 520 and create a new work zone. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Learn more about this upcoming traffic shift on our latest blog post.

Traffic: Eastbound SR 520 and all associated on- and off-ramps between I-5 and Montlake Blvd. will close for construction beginning at 11 p.m. on Friday, May 8, until 5 a.m. Monday, May 11. In addition, the Montlake Blvd. on-ramp to eastbound SR 520 will also close.

What to expect:

During this closure, crews will finalize a traffic shift of the northbound I-5 ramp to eastbound SR 520. When eastbound SR 520 reopens on May 11, northbound I-5 traffic will use a new temporary ramp to access eastbound SR 520. Please pay attention to the new signage and allow for time to adjust to the new setup.

Southbound I-5 and westbound SR 520 are not affected by this work.

SR 520 remains open in both directions across Lake Washington. It is only the section of eastbound SR 520 between I-5 and Montlake Blvd. that will close.