Illinois Route 1

Illinois Route 1 (IL 1) is a state highway in the U.S. state of Illinois. Running parallel to the Indiana border, it is also the longest state road, starting on the south side of Chicago as Halsted Street at an intersection with U.S. Route 12 and U.S. Route 20 (95th Street), south to a free ferry crossing to Kentucky at Cave-in-Rock on the Ohio River. This is a distance of 325.59 miles (523.99 km).

Illinois Route 1

Illinois Route 1 (IL 1) is a state highway in the U.S. state of Illinois. Running parallel to the Indiana border, it is also the longest state road, starting on the south side of Chicago as Halsted Street at an intersection with U.S. Route 12 and U.S. Route 20 (95th Street), south to a free ferry crossing to Kentucky at Cave-in-Rock on the Ohio River. This is a distance of 325.59 miles (523.99 km).