Illinois Department of Transportation announced on Tuesday that the express lanes and reversibles will reopen the week of January 13.
Earlier this year, IDOT said the work was expected be completed by the end of fall.
A spokesperson said the opening was delayed due to several reasons including software issues.
The Kennedy Expressway reversible lanes were closed in March for construction.
The express lanes have been closed from the Edens Junction to Ohio Street. This is phase two of the $150 million three-year project.
Next year, efforts will shift to the outbound Kennedy through Hubbard's Cave.
READ MORE | Kennedy Expressway reversible lanes close for 2nd phase of construction project