Crews installing new Smarter Highways electronic signs will close eastbound Interstate 90 at the Mount Baker Tunnel in Seattle three nights this week.

Drivers can expect the following overnight closures on tonight, Feb. 28 and March 2-3 while crews install signs above the roadway:

• At 7 p.m. crews will begin closing lanes on eastbound I-90 between I-5 and the Mount Baker Tunnel.
• At 9 p.m. crews will close the on-ramps from northbound I-5 and both directions of Rainier Avenue S to eastbound I-90.
• At 11 p.m. crews will shift all eastbound I-90 traffic between I-5 at the Mount Baker Tunnel to the express lanes.

 All eastbound lanes of I-90 and the on-ramps from Rainier Avenue S will reopen by 4 a.m. The on-ramp from northbound I-5 will reopen by 5 a.m.

 During the closures drivers from northbound I-5 and Rainier Avenue S will be detoured to S Dearborn Street and then to 4th Avenue S to eastbound I-90. Drivers accessing eastbound I-90 from Mercer Island will not be affected by the closures.

 WSDOT plans to activate the new Smarter Highways signs on I-90 later this year. The signs will alert drivers to reduce their speed or change lanes when there are collisions or backups on the road ahead.