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Illinois's state route numbers originated in 1918 as State Bond Issues 1 through 46, used to finance the new roads. The numbers of the bond issues were then used to mark the highway routes along the way. Another series of bond issues were authorized in 1924 (47–185) and again were used to mark the roads they paid for.
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.
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.
In 1918, Wisconsin became the first state to number its highways in the field followed by Michigan the following year. [1] In 1926 the American Association of State Highway Officials (AASHO) established and numbered interstate routes (United States Numbered Highways), selecting the best roads in each state that could be connected to provide a national network of federal highways.
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]
State Street; Serves Rockford: US 20 Bus. — — — — 1962: 1984 Served Elgin: US 20 Bus. — — — — 1938: 1968 Serves Chicago; Formerly designated as City US Route 20 City US 30 — — — — 1959: 1960 Served Aurora: US 30 Bus. — — — — 1960: 1970 Served Aurora; Formerly designated as City US Route 30 US 30 Toll —
The route numbers and locations are coordinated by the American Association of State Highway and Transportation Officials (AASHTO). [4] The only federal involvement in AASHTO is a nonvoting seat for the United States Department of Transportation. Generally, most north-to-south highways are odd-numbered, with the lowest numbers in the east and ...
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 ...