Encyclopedia  |   World Factbook  |   World Flags  |   Reference Tables  |   List of Lists     
   Academic Disciplines  |   Historical Timeline  |   Themed Timelines  |   Biographies  |   How-Tos     
Sponsor by The Tattoo Collection
List of Indiana state highways
Main Page | See live article | Alphabetical index

List of Indiana state highways

Note: Indiana has one of the most rational systems of numbering state highways in the United States. 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. Single-digit and two-digit US highways other than U.S. Highway 35 are 'secret' state highways of the same number (that is, US-52 is also "Indiana 52"). Three-digit US routes have "secret" Indiana state route numbers, usually with two-digit numbers.

Three-digit routes are related, as a rule, to the single-digit or two-digit parent US or State route; thus Indiana State Highway 205 is related to Indiana State Highway 5 and Indiana State Highway 120 is related to U.S. Highway 20.

Blatant exceptions to this system are "47" and "67", clearly diagonal routes, the defunct "100" beltline around Indianapolis, and Indiana State Highway 135, which acts like a two-digit state highway.

No rule prevents the use of a number both as a state and as an Interstate route (Interstate 64 and Indiana State Highway 64 even meet)!