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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 ...
Grand Army of the Republic Highway [2] US 12: 46.258: 74.445 US 12/US 20/US 41 at Whiting: US 12 at Michiana Shores: 1926 [3] current Iron Brigade Highway [4] US 20: 155.734: 250.630 US 12/US 20/US 41 at Whiting: US 20 near Angola: 1926 [5] current US 24: 166.846: 268.513 US 24/US 52 near Kentland: US 24 near Fort Wayne: 1926 [5] current
The Illinois Department of Transportation (IDOT), Illinois State Toll Highway Authority (ISTHA), and Skyway Concession Company (SCC) are responsible for maintaining these highways in Illinois. The Interstate Highway System in Illinois consists of 13 primary highways and 11 auxiliary highways which cover 2,248.93 miles (3,619.30 km). [2]
These highways are maintained by the Illinois Department of Transportation (IDOT), with the exception of Illinois Route 390 and parts of Illinois Route 56 and Illinois Route 110, which are maintained by the Illinois State Toll Highway Authority (ISTHA), and all routes that enter the Chicago City Limits are maintained by the Chicago Department ...
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 ...
Ronald Reagan Highway / Northwest Highway US 20: 233.93: 376.47 US 20 in East Dubuque: US 12/US 20/US 41 in Chicago: 1926: current Ulysses S. Grant Memorial Highway US 24: 255.13: 410.59 US 24 in Quincy: US 24/US 52 in Sheldon: 1926: current US 30: 153.79: 247.50 US 30 in Fulton: US 30 in Lynwood: 1926: current US 32 — — US 6 at Moline
As the highway system grew these numbers were altered to accommodate new roads or extensions of older roads. In 1924, additional State Bond Issues were authorized for SBI Routes 47 through 185. These route numbers were originally assigned and grouped to specific regions of the state.
I-90 has two related auxiliary Interstate Highways within Illinois. I-190 is a spur into O'Hare International Airport in Chicago that is also known as the Kennedy Expressway O'Hare Extension or the O'Hare Expressway. I-290 takes a southeasterly dogleg left route accessing the western suburbs and heading eastward into Downtown Chicago. It is ...