US 51
| Mileage | 390 |
| Cities | Anna, Ashley, Assumption, Bloomington, Cairo, Carbondale, Central City, Centralia, Clinton, Cobden, De Soto, Decatur, Du Quoin, El Paso, Heyworth, Hudson, La Salle, Maroa, Minonk, Moweaqua, Oglesby, Pana, Ramsey, Rockford, South Beloit, Vandalia, Wamac, Wenona |
| Junctions | |
| I end - longitude/latitude | 42.496181 /-89.01994 |
| II end - longitude/latitude | 36.991105 /-89.14879 |