- The Seafair Summer Fourth fireworks show at Lake Union will close southbound I-5 exits and onramps on Saturday, beginning at 9:00 p.m. The closures are the southbound I-5 off-ramp to Roanoke St, the Boylston St on-ramp to southbound I-5 and the southbound I-5 exit-only lane and off-ramp to Mercer St. The closures will be complete by 10:00 p.m. The ramps and lane will be reopened at the conclusion of the fireworks display.
Last Updated: 7/1/2015 1:56 PM
From milepost 168 to milepost 168