The Hoosier State Line runs from Indianapolis to Chicago.
INDOT says rain has prevented crews from fixing erosion issues along I-69.
INDOT will announce the remaining routes for I-69 later today in Martinsville.
INDOT will begin working on design options for the interchange in 2016.
Indiana Department of Transportation officials told the Indiana State Budget Committee it needs additional funding to repair the state's aging bridges.
The Indiana Chamber of Commerce says the state faces a $750 million funding gap to maintain its roads. Changes to the state's fuel taxes could help.
The extended contract runs through January, when the state hopes to hire a new company to operate the line from Indianapolis to Chicago.
Section 4 of I-69 from Crane to Bloomington is scheduled to be complete by the end of 2015.
The Indiana Department of Transportation is seeking a court order to bypass a county noise ordinance that it says is impeding construction of I-69.
INDOT typically spends about $30 million in road repairs and maintenance each winter.