The Indiana Department of Transportation now says Smith Road will reopen Sept. 13.
The project at the intersection of Smith Road and State Road 46 was expected to be finished by Aug. 30.
The closure was previously extended for utility relocation, which paused construction early on.
Improvements at the intersection include pedestrian crosswalks, left-turn lanes and expanding a bike lane on North Smith Road.
Work on the intersection began in mid-March, with South Smith Road closed first. The northern part between S.R. 46 and East Morningside Drive was closed later.
Read more: Smith Road to be partially closed for 90 days for road expansion