^The first northbound trailblazer north of Goreville, seen by those approaching Interstate 24, September 2021.
Illinois Route 148 runs north-south in southern Illinois, as somewhat of an alternate to Illinois 37 and Interstate 57 between Mount Vernon and Interstate 24's western endpoint. It seems like a western alternate to Illinois 37 because it starts and ends at that route.
Illinois 148's intersections will be listed from south to north, starting with a T-intersection at Illinois 37 very near the junction of Interstate 57 and Interstate 24, in southern Williamson County:
Illinois 148's intersections will be listed from south to north, starting with a T-intersection at Illinois 37 very near the junction of Interstate 57 and Interstate 24, in southern Williamson County:
From its southern terminus, Illinois 148 heads west to have an interchange with Interstate 57, just north of Interstate 24's western terminus:
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Illinois 148 turns northerly and crosses Illinois 13 near the village of Energy:
Illinois 148 crosses Illinois 149 in Zeigler, the town with Illinois's highest ZIP code (62999):
Illinois 148 crosses Illinois 14 at Christopher:
Illinois 154 joins from the west at Sesser:
Shortly after, Illinois 154 splits off to continue easterly as Illinois 148 keeps moving northbound:
After crossing under Interstate 57, Illinois 148 ends in Mount Vernon at Illinois 37, at a point common to the northwestern endpoint of Illinois 142. Downtown Mount Vernon and Illinois 15 lie slightly farther northward along Illinois 37.
