U.S. Routes are owned and maintained by INDOT. 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. ... Image File history File links US_blank. ... Image File history File links I-blank. ... Interstate Highways are owned and maintained by INDOT unless it is a toll road. ... State Roads in the US state of Indiana are numbered rationally: in general, odd one-digit and two-digit highways are north-south highways, numbers increasing toward the west; even one-digit and two-digit highways are east-west highways, numbers increasing toward the south. ... Current U.S. Route shield Current U.S. Route shield in California The system of United States Numbered Highways (often called U.S. Routes or U.S. Highways) is an integrated system of roads and highways in the United States numbered within a nationwide grid. ... The Indiana Department of Transportation is the agency of the state of Indiana charged with maintaining and regulating transportation and transportation related infrastructure such as state owned airports, state highways and state owned canals or railroads, as well as state routes, US highways and Interstates that lie within the state. ...