INDOT walks through a proposed diverging diamond intersection for S.R. 2 in New Carlisle

NEW CARLISLE, Ind. -- The Indiana Department of Transportation is proposing a major redesign of the intersection of S.R.2 and Larrison Boulevard in New Carlisle, aiming to ease congestion tied to growing industrial development in the area.

The proposal, presented during a public meeting at New Prairie High School, would transform the intersection of into a diverging diamond interchange — a design that temporarily shifts traffic to the left side of the road to improve flow and reduce conflict points.

Transportation officials say the intersection is already congested and could worsen as development expands nearby, including increased truck traffic.

“It’s the most cost-effective out of all the options,” said Cassandra Bajek, public relations director for INDOT Northwest. “Because of the north-south movements through this interchange, it’s the most efficient at moving traffic.”

A diverging diamond design uses two traffic signals to guide vehicles across opposing lanes, eliminating the need for left turns across oncoming traffic. While the concept may be unfamiliar to some drivers, officials say it has proven successful in other parts of the state and country.

“We do have one in northeast Indiana off I-69,” Bajek said. “They’ve all performed well in similar circumstances with development and the truck traffic that we see in this location.”

INDOT says industrial growth in the area is a key factor behind the proposal. Without changes, officials warn the intersection could face significant delays or even gridlock.

If approved, construction could begin as early as this summer and continue through 2028. During that time, S.R. 2 would be reduced to one lane in each direction.

The proposal is not yet final. INDOT is accepting public comments for the next two weeks and has made presentation materials and a feedback form available online.