Seattle City Light will be doing work that requires rolling slowdowns of northbound SR 599 and southbound SR 99 between the hours of 6 and 11 a.m. Saturday, Oct. 11.

Northbound slowdowns will start on SR 599 at the I-5 junction.

Southbound slowdowns will start on SR 99 at South Holden Street. There will be up to six 15-minute rolling slowdowns during the five-hour period. Seattle City Light will be pulling fiber optic communication cables across the roadway just north of Tukwila International Boulevard where SR 599 turns into SR 99.