SR-520 will be closed this weekend as crews install girders for the future walking and biking bridge that will cross the freeway heading toward the Arboretum, among other work.
The cross-lake trail will be closed along with the rest of the freeway this time. The work is scheduled to begin 10 p.m. Friday and end by 5 a.m. Monday.
The bridge trail may be open for an out-and-back ride from the Eastside, which is nice when the bridge is car-free and quiet.
More details from WSDOT:
Travelers should plan ahead and find alternate routes for their trips across Lake Washington this weekend. At 11 p.m. Friday, Feb. 24, crews will close both directions of State Route 520 and all associated ramps between Interstate 5 in Seattle and 92nd Avenue Northeast in Clyde Hill. The around the clock closure, which includes the SR 520 Trail, will extend until 5 a.m. Monday, Feb. 27.
During the weekend closure, contractor crews working for the Washington State Department of Transportation will place 30 girders, or support beams, over the highway for a future pedestrian and bicycle bridge. Seven girders will also be added for new HOV ramps that will lead to and from a new 3-acre lid under construction in Seattle’s Montlake neighborhood. People can watch the weekend work on this construction camera during the closure.
The 72-foot wide bike and pedestrian bridge will be the first of its kind in Seattle. Lined with green space, trees and shrubs, the 14-foot path will be a new north/south non-motorized option to cross over SR 520 while taking foot and wheel traffic off Montlake Boulevard. Crews expect to open the new facility at the end of the year.
The work is part of the $455 million SR 520 Montlake Project. The project also builds three new eastbound lanes over Union Bay between Montlake Boulevard and the floating bridge on Lake Washington.