The I-90 bridge will be closed the next few days at the following times:
Today - 1:15pm-2:40pm
Friday - 12:45pm-2:40pm
Saturday - 12:45pm-2:40pm
Sunday - 12:45pm-2:40pm
Friday-Sunday there will be shuttles from the Othello station to the Hydro course.
Click here to see if your bus route is affected by Seafair.
More at Seattle Transit Blog.