From WSDOT:

Crossing Lake Washington this weekend will require another route besides State Route 520 when the highway closes for two days of round-the-clock construction work.

Crews working for the Washington State Department of Transportation on the SR 520 Eastside Transit and HOV Projectwill close all lanes to traffic between I-405 and Seattle’s Montlake Boulevard. The closure is scheduled for 11 p.m. Friday, Feb. 7 to 5 a.m. Monday, Feb. 10. The highway will remain open to traffic between I-5 and Montlake Boulevard, and east of I-405.

During the closure, crews will perform a variety of upgrades within the highway’s Eastside corridor, including realignment of traffic lanes in both directions between 92nd Avenue Northeast and I-405. They’ll also install new electronic signage, noise walls, utility lines and storm water drainage pipes. Other crews working on WSDOT’s SR 520 Bridge Replacement and HOV Program will pour concrete for the support columns of a new West Connection Bridge. This structure will join the new SR 520 floating bridge that’s under construction with the highway’s existing lanes in Seattle.

Night work is planned this weekend and residents near the work zone might hear construction noise. More news about the upcoming construction activity can be found online. More information about SR 520 traffic closures also is available online.

The Eastside Transit and HOV project involves widening SR 520 to six lanes between Medina and I-405, rebuilding interchanges, constructing highway lids and median bus stops, and installing fish-friendly culverts. The completed Eastside corridor is expected to open to traffic in late summer 2014.