Intersections from west to east:

US30 joins IL126 east at Plainfield IL126 splits off of US30 in Plainfield US30 joins US30 joins IL59 south at Plainfield

US30 splits off of IL59 to head east again

I-55 near Joliet

IL7 by Crest Hill

US6/IL53 at Joliet

I-80 at New Lenox

US45 at Frankfort

IL43 near Matteson

I-57 near Matteson

IL1 at Chicago Heights

IL394 at Ford Heights

IL83 near Dyer, Indiana

US30 crosses into Indiana near Dyer.

It passes through these towns: Plainfield, Joliet, New Lenox, Frankfort, Matteson, Olympia Fields, Chicago Heights, Ford Heights, and Lynwood.