Illinois Route 140 runs east-west in southwestern Illinois, beginning in Alton and running east toward Vandalia. Its eastern end is at US Route 40 just shy of reaching Vandalia.
The western end of Illinois 140 is at Illinois 143 in Alton, a block east of US Route 67...
The western end of Illinois 140 is at Illinois 143 in Alton, a block east of US Route 67...
As Illinois 140 leaves Alton, it crosses Illinois 3 at a junction where Illinois 111 switches from a concurrency with Illinois 3 heading south to a concurrency with Illinois 140 heading east...
At a single-point urban interchange (SPUI), Illinois 140 and Illinois 111 meet Illinois 255 as they head eastward together...
Shortly after the Illinois 255 interchange, Illinois 111 splits off to head south independently of Illinois 140:
Illinois 140 crosses Illinois 159 north of Edwardsville:
At Hamel, Illinois 140 meets Illinois 157 at that route's northern end:
Just past the junction with Illinois 157, Illinois 140 meets Interstate 55 at a diamond interchange...
After passing through Alhambra, Illinois 140 meets the northern end of Illinois 160...
As Illinois 140 approaches Greenville, Illinois 127 comes from the north and joins it eastward...
In Greenville, Illinois 127 splits from Illinois 140 to continue south:
Illinois 140 then reaches its eastern end at US Route 40 in Mulberry Grove, the next town west of Vandalia...
