The Washington State Department of Transportation has described this weekend as one of the busiest construction stretches of the summer, with closures affecting I-405, I-5, SR 520 and SR 202 along with several local roads across King County. Most begin Friday and run through Monday morning. The surge follows a pause in work during the FIFA World Cup matches held in June and July.
The largest single impact is a full closure of northbound I-405 between North Southport Drive and Coal Creek Parkway Southeast, from 11:30 p.m. Friday until early Monday. Crews will excavate drainage crossings, replace pavement and shift traffic as part of a widening and toll-lane project, and WSDOT has warned of heavy congestion approaching Renton. In Kirkland, both northbound and southbound ramps at Northeast 85th Street close from 10 p.m. Friday until 5 a.m. Monday, along with Northeast 85th between Sixth Street and 120th Avenue Northeast, while work continues on a roundabout and bus rapid transit station.