The northern most runway at Hartsfield-Jackson Atlanta International Airport, Runway 8L-26R, will be closed temporarily for extensive improvements beginning Monday, Sept. 15. As a result, some arrivals will be diverted to the most southern runways, runways 10-28 and 9R-27L. Certain areas of Clayton County, Forest Park and College Park may notice more air traffic than usual. Normal operations of the northern runway will resume Oct. 15 when work is slated to be completed.