The Ohio Department of Transportation has launched a $200m project to reconstruct the Interstate 71 / Interstate 670 interchange in Columbus, Ohio, US.

The project will be carried out by Kokosing Construction and CH2M Hill.

The work will untangle the junction through downtown Columbus in the first phase and complete it by 2014.

The project also includes the addition an additional lane on Interstate 670 to reduce weaving across traffic lanes to exits, and 22 new bridges.