The Indiana Department of Transportation (INDOT) is responsible for the establishment and classification of a state highway network which includes Interstate Highways, U.S. Highways, and State Roads. There is no rule preventing the same numbering between state roads, U.S. routes, and Interstate highways, although traditionally, INDOT has avoided state road numbers which are the same as those on U.S. routes within the state.
Indiana has a mileage cap of 12,000 miles (19,000 km) for its highway system.[1]
^Indiana Code Title 8, Article 23, Chapter 4, Section 2a
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