The Big Four® Bridge will be closed for part of the day on Friday, April 20th, while planes do practice runs for the Air Show, and for most of the day on Saturday, April 21. From the Kentucky Derby Festival:

Big Four® Bridge Thunder, Airshow, and Airshow Practice closure times:

Friday, April 20 – closed 11am until 5pm

Saturday April 21 –closes at 9am until the show is complete. Based on traffic on the Ohio, the bridge could stay closed until approx 11:30pm.

The Kentucky Derby Festival will have large signage in place detailing this information on both sides of the river.