The new expected completion date is Dec. 22, according to Georgia Department of Transportation spokeswoman Cissy McNure. The $32.2 million project, which began in late 2011, is about 65 percent complete.
Weather delays, utility issues and other unforeseen conditions contributed to the delay, which McNure said are common reasons road construction projects finish behind schedule.
Soon after construction began, work crews had trouble locating water lines near the intersection of Bobby Jones Expressway and Deans Bridge Road.
The existing four-lane interstate is being widened to three lanes in each direction from just west of Gordon Highway to just east of Deans Bridge Road. The interchanges will be reconstructed to replace the current cloverleaf design.
The original budget was $29.8 million. About $20.3 million has been spent so far.
Motorists should expect continued delays on Bobby Jones Expressway until construction is finished, McNure said.