The Washington State Department of Transportation will close all lanes of Interstate-90 across Lake Washington in order to accommodate air show practices and performances of the six Navy jets during a four-day period.

I-90  will be closed to all vehicles, pedestrians and cyclists, eastbound and westbound, both mainline and express lanes, between Interstate-5 in Seattle to Island Crest Way on Mercer Island on the following dates:

WSDOT officials warn drivers to plan well ahead of the actual closure times.

Note that ramps on or off the bridge will be closed up to 30 minute before the jets arrive overhead.

• Thursday, July 31: Between 9:45 a.m. and noon and between 1:15 and 2:40 p.m., for practice.

• Friday, Aug. 1: 12:15 until 2:40 p.m. for practice.

• Saturday, Aug. 2: 12:15 until 2:40 p.m. for full show.

• Sunday, Aug. 3: 12:15 until 2:40 p.m. for full show.

I-90 east of Mercer Island will not be closed during the performance, although drivers should note that heavy congestion during these closures often restricts access to the exits.

For about the bridge closures, visit www.mercergov.org/seafair.