All lanes of State Route 520 in both directions will close overnight Thursday, Sept. 29, between Montlake Boulevard and 92nd Avenue Northeast. The closure begins at 11 p.m. and wraps up at 5 a.m. Friday.

Washington State Department of Transportation contractor crews working on the West Approach Bridge North Project will use the full closure to remove a sign bridge obstructing the new WABN bridge structure and pour concrete for the new permanent structure.

Drivers planning travel to and from the Eastside should take Interstate 90 or an alternate route around Lake Washington.