The House plan would divert more money from the sales tax on gasoline into road funding.
The project took more than three years to finish and there are still two more sections of the controversial highway left to be completed.
It’s a one-time proposal, not a long-term solution.
Gov. Mike Pence will gather with local and regional leaders to cut the ribbon on the section of interstate Wednesday morning.
The governor says crews will widen the interstate to three lanes in each direction from Merrillville south to "at least State Road 2 near Lowell."
INDOT won't make a final decision on the route until 2018.
The bill provides five years of funding, with more than $5 billion for Indiana.
INDOT will hold public hearings on section six throughout central Indiana this week.
One southern Indiana town is seeing benefits from the opening of the previous three sections of interstate.
Pence says the Democrats' proposal could bankrupt the state.