Washington State Department of Transportation work crews will close all lanes of Interstate 405 in both directions between SR 167 and Maple Valley Highway (SR 169) this weekend to remove the old Benson Road South Bridge. Drivers should expect delays on detour routes and plan ahead by leaving early or avoiding unnecessary trips this weekend.

WSDOT traffic engineers predict congestion on SR 167, SR 169, I-405, I-5 and I-90 as drivers use alternate routes to navigate around the closure.

Crews will close all lanes of I-405 between SR 167 and SR 169 at 2 a.m., Saturday, July 10. The road will reopen at 11 a.m. Sunday, July 11.

During the 33-hour closure crews will remove the old bridge and replace damaged concrete panels, install signs, install sign bridges, work on storm drainage, clean up and safely reopen the freeway by Sunday before noon.

During the 33-hour closure, drivers can:

• Travel before 9 a.m. or after 10 p.m. on Saturday to avoid the worst congestion.

• Plan extra time to get to their destination.

• Check www.wsdot.wa.gov before they head out.