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The Illinois Highway Code (605 ILCS 5) states that all state highways are to be numbered and that no state highway shall go unnumbered. [2] In addition, roads in the system include state highways that connect
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 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] The Interstate Highway with the longest section in Illinois is Interstate 57 at 358.57 miles (577.06 km); the shortest is Interstate 41 at 0.90 miles (1.45 km).
The Illinois Department of Transportation was created by the 77th Illinois General Assembly in January 1972. The department absorbed the functions of the former Department of Public Works and Buildings, acquired some planning and safety inspection functions of other state agencies, and received responsibility for state assistance to local mass transportation agencies such as the Chicago-area ...
Illinois-Indiana state line Peotone-Beecher Road, Indiana Avenue — — CR 25: 18.079: 29.095 IL 53 in Wilmington: CR 70 (Drecksler Road) in Peotone: Wilmington-Peotone Road — — Longest county highway in Will County CR 28: 4.012: 6.457 South Will-Kankakee county line near Essex: IL 113 near Braidwood: Essex Road — —
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...
Illinois 23 is a major arterial route in rural central and north-central Illinois. It is a parallel to the Interstate 39 / U.S. Route 51 combination approximately 20 miles (32 km) west. The road starts near downtown Pontiac and runs as the main highway north, intersecting with Interstate 55 and former U.S. Route 66 .
Illinois Route 97 (IL 97) is a north–south state highway in the central and western portions of the U.S. state of Illinois. It extends from I-55 Business (Business Loop I-55) in Springfield northwest to U.S. Highway 150 (US 150) near Galesburg. It crosses over the Illinois River on a bridge west of Havana. This is a distance of 102.23 miles ...