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2. Illinois Department of Transportation - Wikipedia

   en.wikipedia.org/wiki/Illinois_Department_of...

   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 ...

3. List of Interstate Highways in Illinois - Wikipedia

   en.wikipedia.org/wiki/List_of_Interstate...

   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]

4. List of state routes in Illinois - Wikipedia

   en.wikipedia.org/wiki/List_of_state_routes_in...

   IL 1 was posted on what is now IL 394 from 1957 to 1964, the old road was Alt. IL 1 during that time IL 2: 73.91: 118.95 IL 40 in Sterling: WIS 213 in South Beloit: 1918: current Originally Rockford to Dixon to Mendota to Cairo; replaced by US 51 south of Mendota IL 3: 187.44: 301.66 US 51/IL 37 in Cairo: IL 100 in Grafton: 1918: current

5. List of U.S. Highways in Illinois - Wikipedia

   en.wikipedia.org/wiki/List_of_U.S._Highways_in...

   Grand Army of the Republic Highway US 12: 85.14: 137.02 US 12 near Richmond: US 12/US 20/US 41 in Chicago: 1928: current US 14: 69.55: 111.93 US 14 near Harvard: US 41 in Chicago: 1933: current 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

6. Illinois State Police - Wikipedia

   en.wikipedia.org/wiki/Illinois_State_Police

   The Illinois State Police (ISP) is the state police agency of the U.S. state of Illinois.The Illinois State Police is responsible for traffic safety on more than 300,000 miles of total roadway, including 2,185 miles of interstate highways and 15,969 miles of state highways.

7. U.S. Route 67 in Illinois - Wikipedia

   en.wikipedia.org/wiki/U.S._Route_67_in_Illinois

   The road that would become US 67 was first improved as an auto trail called The Burlington Way, later the Mississippi Valley Highway. In 1918, Illinois voters approved a bond package that created a 48-route highway system. Most of the Mississippi Valley Highway became Route 3. US 67 replaced Route 3 north of Alton in 1926.