Motorists may encounter delays, reduced speeds and detours as streets, lanes and ramps are closed nightly for the ongoing reconstruction of the I-285/Ga. 400 interchange in the Perimeter area of Sandy Springs, Dunwoody and Brookhaven.

All work is "weather permitting" and scheduled for 9 p.m. to 5 a.m., according to the Georgia Department of Transportation. Information: https://bit.ly/2OCwYGL

Monday-Saturday: southbound Peachtree Dunwoody Road will be closed from Hammond to Lake Hearn drives.

Tuesday-Thursday: Two right lanes of eastbound I-285 from Glenridge Drive to Peachtree Dunwoody, and the ramp from southbound Ga. 400 to eastbound I-285, will be closed. Traffic pacing is planned for eastbound I-285 from Roswell Road to Ga. 400

Thursday-Saturday: The ramp from southbound Ga. 400 to westbound I-285, and from westbound I-285 to northbound Ga. 400, will be closed.

Also, daytime traffic pacing is scheduled for 1:30 to 2 p.m. Monday, Wednesday and Friday for eastbound I-285 from Roswell Road to Perimeter Center Parkway; westbound I-285 from Chamblee Dunwoody Road to Perimeter Center; and on Perimeter Center from Lake Hearn to Hammond.