These roads typically follow along local streets often along a former U.S. Route or state highway that had been replaced by an Interstate.

is to a major arterial surface street that serves downtown Springfield, Illinois.

It runs north from the intersection of I-55 and I-72 through downtown to Illinois Route 4 (IL 4, Veterans' Parkway).

The route's north–south portion largely passes through a retail core, including Eastland Mall and The Shoppes at College Hills.

The highway is also the recommended route from I-39, I-55, and I-74 to Central Illinois Regional Airport via IL 9.