US Route 14 runs southeast from the Wisconsin border to end at US Route 41 on the north side of Chicago. This causes it to cut across many northern and northwestern suburbs.
US Route 14 enters Illinois from Wisconsin heading south into Harvard, Illinois...
In Harvard, Illinois 173 joins US Route 14 from the east...
In Morton Grove, US Route 14 trades places with Illinois 58 as it joins Illinois 43 southward:
After only a few blocks, US Route 14 splits from Illinois 43 to go southeasterly again (the supplementary arrows are missing from this sign assembly, photographed coming in from the southeast):
US Route 14 meets an interchange with Interstate 94 with almost full access (northbound traffic on I-94 can't access northwest on US Route 14):
US Route 14 is squarely within Chicago city limits now, and it crosses Illinois 50:
US Route 14 heads due east on Peterson Avenue, and a southeasterly US Route 41 crosses over:
US Route 14 then turns southerly to end at an east-west section of US Route 41 on the north side of Chicago: