Southbound I-5 closed through downtown Seattle overnight Friday, July 7

Late night drivers who use southbound Interstate 5 through downtown Seattle should prepare for traffic delays overnight Friday, July 7.

Washington State Department of Transportation tunnel maintenance crews will close lanes and ramps on southbound I-5 beginning at 11:59pm. Friday. 

The closures will allow crews to safely perform routine maintenance and testing of the fire suppression system under the Washington State Convention Center. 

All lanes and ramps will reopen at 5am Saturday morning.