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  2. List of state routes in Illinois - Wikipedia

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

    Inventory Route Number sign near Jacksonville IL (Morgan County) on US-67. Illinois uses unique "inventory number" signage on rural roads that are owned or maintained by IDOT but may or may not be part of the US or Illinois highway systems. These number signs are white squares, with a green divided circle.

  3. Illinois State Highway System - Wikipedia

    en.wikipedia.org/wiki/Illinois_State_Highway_System

    Illinois Route 72 cross-sign mounted on a stoplight in Hoffman Estates. SBI Numbers are still used for several purposes, even when they do not match the posted number. IDOT District maps still refer to SBI numbers on the various roads it maintains, along with other non-posted designations that refer to how the route was authorized.

  4. List of Interstate Highways in Illinois - Wikipedia

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

    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).

  5. Roads and expressways in Chicago - Wikipedia

    en.wikipedia.org/wiki/Roads_and_expressways_in...

    A mile later, just past Cicero (4800 W), the starting letter changes to L, and mile by mile the letters progress up to P. Additionally, for most of the first mile west of the Illinois/Indiana state line, streets are lettered from Avenue A (S State Line Road) at the state line (4100 E) to Avenue O (3430 E), forming the A group.

  6. 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

  7. Interstate 94 in Illinois - Wikipedia

    en.wikipedia.org/wiki/Interstate_94_in_Illinois

    He was a sponsor of Illinois's first highway bond issue in 1918. [ 4 ] From the southern terminus of the Edens, I-94 follows part or all of several other named highways; joining I-90 on the Kennedy Expressway and the Dan Ryan Expressway through the center of Chicago, following the Bishop Ford Freeway through the southside of Chicago to I-80 ...

  8. U.S. Route 45 in Illinois - Wikipedia

    en.wikipedia.org/wiki/U.S._Route_45_in_Illinois

    U.S. Route 45 (US 45) in the state of Illinois is a major north–south U.S. Highway that runs from the Brookport Bridge over the Ohio River at Brookport north through rural sections of eastern Illinois and then through the suburbs of Chicago to the Wisconsin state line east of Antioch.

  9. List of Interstate Highways - Wikipedia

    en.wikipedia.org/wiki/List_of_Interstate_Highways

    These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, even-numbered Interstates run east–west, with lower numbers in the south and higher numbers in the north; odd-numbered Interstates run north–south, with lower numbers in ...