^Westbound trailblazer welcoming Illinois 120 to its final stretch in Woodstock, May 2019.
Illinois Route 120 is an east-west route in the northern suburbs of Chicago, running through McHenry and Lake Counties. It starts in Woodstock and runs east to Waukegan.
The western end of Illinois 120 is on the northwest side of Woodstock at US Route 14:
The western end of Illinois 120 is on the northwest side of Woodstock at US Route 14:
After winding through downtown Woodstock, Illinois 120 crosses Illinois 47:
In McHenry, Illinois 31 comes from the south and joins Illinois 120 east for a bit:
Then, Illinois 31 splits off of Illinois 120 to continue north:
Shortly after that, Illinois 120 meets the northwestern terminus of Illinois 60...
At Hainesville, Illinois 120 meets the southeastern end of Illinois 134:
In Grayslake, Illinois 120 crosses Illinois 83 near the western end of Illinois 137:
After traveling another couple miles, Illinois 120 crosses US Route 45:
Illinois 120 becomes somewhat of an expressway and has ramps to Illinois 21 at a folded diamond interchange:
Illinois 120 passes over Interstate 94, with a partial interchange that only accesses the tollway to/from the south...
At a convoluted interchange by Waukegan that includes the northern end of Illinois 43, Illinois 120 accesses US Route 41...
Illinois 120 ends on the west side of Waukegan at Illinois 131...