AUGUSTA, Maine (AP)   Maine transportation officials are close to finishing multimillion dollar emergency repairs to an Augusta overpass, but they are still at a loss as to who caused the damage.

The state Department of Transportation says they will configure the Interstate 95 overpass back to its original layout on Thursday. The Bangor Daily News reports officials were forced to install temporary exit ramps in November while crews repaired the nearby overpass where workers found a massive crack in October.

According to DOT spokesman Ted Talbot, there are still no leads on the driver who caused the crack and officials have not found witnesses, video footage or debris related to the crack.

Talbot says repair work has been completed ahead of schedule.