State highway officials say it should be complete in about 2 to 3 weeks.
All crews have left to do is lay down a little more asphalt in the northbound lane - as well as paint and put up signs.
The project engineer says only about 50 percent of the contract for the project was used.
"We've only used about half the time that was allotted, by the time that we're finished it will be close to three quarters of the time that we had set up for the job, so they're ahead of schedule definitely," says Jeff Stroud, Arkansas Highway Department engineer.
Eventually the state highway department plans to extend the widened lanes all the way up to Bentonville.