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I-57 is the longest Interstate Highway in the state of Illinois, spanning 364.16 miles (586.06 km) long with Chicago being the main city along its northern route and Memphis being the southern main city along its southern route. I-57 then enters Illinois across the Mississippi River into Cairo.
SBI Route 57 was the current US 41 and IL 50 from Highland Park to Chicago. [4] In 1949 it was moved to Hull to Quincy, following much of the same alignment it does today. As late as 1962, it was moved from its original alignment following 8th Street, Jackson Street, and 12th street to its current alignment following Gardner Expressway and 3rd Street.
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 ...
At the eastern end of the Quincy Memorial Bridge, eastbound US 24 overlaps Illinois Route 57 (IL 57) northbound (4th Street) for two blocks before IL 57 ends at IL 104 (Broadway) and westbound US 24 turns off onto the bridge at the northern terminus of IL 57. US 24 continues north at IL 104 and serves only the northwestern portion of Quincy.
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).
I-39/US-51 join I-90, making US 51 one of the few toll highways in Illinois that is a U.S. Highway. US 51 exits I-39/I-90 just a mile south of the Wisconsin state line. Then US 51 follows Illinois Route 75 (IL 75) west to the intersection of IL 251, and then turns north through South Beloit, Illinois to enter Wisconsin.
SBI Route numbers that were superseded by other routes, US or state routes were often reused. For example, SBI Route 61 was originally assigned to a road segment in northeastern Illinois, but was reassigned to a route in western Illinois, sometime after 1937. Illinois Route 72 cross-sign mounted on a stoplight in Hoffman Estates
Illinois Route 1 (IL 1) is a state highway in the U.S. state of Illinois.Running parallel to the Indiana border, the highway starts at the free ferry crossing to Kentucky at Cave-in-Rock on the Ohio River and runs north to the south side of Chicago as Halsted Street at an intersection with Interstate 57.