Length: 224 mi. Indiana State Road 3 (SR-3) is a highway in east central Indiana that is divided into two segments that are separated. The road begins near the Michigan state line, and ends near the Ohio River. The highway crosses the counties of Clark, Scott, Jennings, Decatur, Rush, Henry, Delaware, Blackford, Wells, Huntington, Allen, DeKalb, Noble, and LaGrange.
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