Drivers face a jarring bump at overpasses where the asphalt meets concrete bridges. Along SR 520, the asphalt road is settling and crumbling in places and it’s time for WSDOT to upgrade the roadway. Asphalt is a weaker material that is more vulnerable to water and freezing damage than sturdier concrete. 
This project replaces the crumbling asphalt with new concrete slabs where the road meets the concrete overpasses. Other parts of the route will be repaved to extend the life of the road.
Construction will occur between I-405 in Bellevue and West Lake Sammamish Parkway in Redmond. New concrete sections will be built between March and May 2009 near five overpass bridges. The mainline highway will be repaved in summer 2009.
Weekend Closures
Weekend closures are planned for up to eight weekends in March and April, and possibly May. One lane will remain open on westbound or eastbound SR 520 between I-405 and West Lake Sammamish Parkway.
Nighttime Lane Closures
Nighttime lane closures are planned during the summer paving months, roughly May through August 2009. One lane will remain open to traffic during construction.
More Info
For more info on the SR 520 construction and repaving project, click here.
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An easy way to get WA State DOT news is via Twitter by following @wsdot. it's their official twitter feed: http://twitter.com/wsdot
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