Drivers traveling east from South Seattle on I-90 tonight should be prepared for delays and detours. From 11:00 am tonight until 5:00 am tomorrow morning, eastbound I-90 will be closed between I-5 and I-405, with traffic detoured to the I-90 express lanes. Ramps to eastbound I-90 from northbound I-5 and Rainier Avenue South will be closed, as well as ramps on Mercer Island and further east to I-405. There will be other eastbound closures on the East Side on Wednesday and Thursday nights.
The closures are for the installation of new electronic signs as part of the Smarter Highways project. The Smarter Highways traffic management system will feature a network of sensors and electronic signs to provide drivers with information. A WSDOT video here shows how it will work. These signs have already been installed on northbound I-5 in South Seattle and will be activated there later this summer.
View I-90 Closures, May 18, 2010 in a larger map