![]() ![]() Interstate Highway shields for Interstate 69 and Interstate 465 | |
Interstate Highways highlighted in red | |
Highway names | |
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Interstates | Interstate X (I-X) |
US Highways | U.S. Route X (US X) |
State | State Road X (SR X) |
System links | |
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Interstate Highways are owned and maintained by the Indiana Department of Transportation (INDOT) unless it is a toll road.
The system was authorized by the Federal-Aid Highway Act of 1956, which provided federal funds for construction of limited access highways. Indiana's initial set of seven Interstate Highways were announced in September 1957.[1]
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