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The highway passes just to the west of the St. Louis Regional Airport and Southern Illinois University Edwardsville. Although IL 255 was designed to federal Interstate Highway standards , it was built by the Illinois Department of Transportation (IDOT) using state-provided funds.
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 ...
Illinois Route 336 (IL 336, also known as the Thomas A. Oakley Memorial Highway) is a four-lane freeway/expressway combination that serves western Illinois.It is also used by the Illinois Department of Transportation (IDOT) as a part of Federal-Aid Primary Highway 315 (FAP315) to refer to a future project connecting the cities of Quincy and Peoria via underserved Macomb.
State highways may be maintained by either the municipalities if within a municipality, or the Illinois Department of Transportation. [5] Should a highway run through a municipality, IDOT is authorized to choose a route through the municipality in order to make a route contiguous for through traffic.
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 ...
Interstate 255 (I-255) is a bypass route of I-55 in Greater St. Louis.Along with I-270, it forms a loop around the central portion of the bi-state metro area; a majority of I-255 is located on the Illinois half.
In late 2005, the intersection with Mannheim Road was reconstructed to remove unsafe conditions and bring the route closer to Interstate standards. In the late 1990s, the Illinois Department of Transportation (IDOT) restriped I-190 at I-294. This action increased the number of lanes west of I-294 from two to three.
Illinois Route 140 (IL 140) is a 52.05-mile-long (83.77 km) east–west highway with its western terminus at Illinois Route 143 in Alton and its eastern terminus at U.S. Route 40 (US 40) near Mulberry Grove.