WSDOT: Construction updates for 3/7-3/16

Our region is heading into a major closure weekend with concurrent lane reductions on northbound I-5 and northbound SR 99, and a scheduled closure of both directions of I-405. Overlapping construction impacts will become more common throughout this and next year as the Revive I-5: Ship Canal Bridge Preservation project continues with months-long lane reductions through 2027.

Both directions of I-405 in Bothell to close for ramp removal, March 7-9 and March 13-16 

The I-405/Brickyard to SR 527 Improvement Project, which expands and enhances 4.5 miles of I-405 through Bothell, has scheduled two consecutive weekends of I-405 closures to remove the remaining portion of the previous northbound I-405 to SR 522 ramp over I-405.

• March 7-9: 6 p.m. Saturday, March 7, to 4 a.m. Monday, March 9, crews will close all lanes of northbound I-405 at the SR 522 Interchange and all lanes of southbound I-405 from SR 527 to SR 522 to remove ramp sections over I-405.
• March 13-16: 9 p.m. Friday, March 13, to 4 a.m. Monday, March 16, crews will close all lanes of northbound I-405 at the SR 522 Interchange and all lanes of southbound I-405 from SR 527 to SR 522. All lanes of southbound I-405 may reopen as early as 9 a.m. Sunday, March 15, depending on ramp removal progress. 

More information on the closures and the signed detour routes can be found in the news release and I-405/Brickyard to SR 527 Improvement Project webpage. Detour routes are limited and cannot carry normal I-405 freeway volumes. Travelers should expect 2- to 3-mile backups on I-405 during the full closures. A one-hour delay in both directions is the best-case scenario during peak travel times.