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The three-level stacked roundabout is a variation on the roundabout interchange in which both roads are grade-separated. It is similar to the three-level diamond interchange except that the small square of that latter interchange is enlarged to a true roundabout. If the roundabout is sufficiently large, the interchange may require only two ...
Illinois Route 13 (IL 13) is a major east–west state route in southern Illinois. Illinois 13 has its western terminus at Cahokia Heights at Illinois Route 157 and its eastern terminus at the Kentucky state line and the Ohio River, at Kentucky Route 56. This is a distance of 151.54 miles (243.88 km). [1]
Illinois Route 47 (IL 47) is a 169.76-mile-long (273.20 km) largely rural north–south state highway that runs from the Wisconsin state border at Highway 120 near Hebron, to IL 10, just south of Interstate 72 (I-72) near Seymour. [1]
Illinois Route 16 (IL 16) is an east–west highway in central Illinois. Its western terminus is at the Joe Page Bridge over the Illinois River in Hardin, while its eastern terminus is at Paris at Illinois Route 1 and U.S. Route 150, with Illinois Route 133. This is a distance of 174.66 miles (281.09 km). [1]
Illinois Route 106 (IL 106) is a 66.47-mile-long (106.97 km) east–west state highway in western Illinois. It runs from a new interchange with Interstate 72 (I-72) near East Hannibal (across from Hannibal, Missouri ) to U.S. Route 67 (US 67) in White Hall .
The first cloverleaf interchange patented in the US was by Arthur Hale, a civil engineer in Maryland, on February 29, 1916. [3] [4]A modified cloverleaf, with the adjacent ramps joined into a single two-way road, was planned in 1927 for the interchange between Lake Shore Drive and Irving Park Road in Chicago, Illinois, but a diamond interchange was built instead.
U.S. Route 40 (US 40) runs east–west across south central Illinois for 159.8 miles (257.2 km). US 40 enters the state from Missouri across the Poplar Street Bridge over the Mississippi River at East St. Louis concurrent with Interstate 55 (I-55) and I-64 and exits just south of State Line, Indiana, running concurrently with I-70.
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. This is a distance of 428.99 miles (690.39 km). [1]