Illinois 140 is an east-west route whose eastern half follows along US40 closely and whose western half skims the northern reaches of the metro-east, passing right through Alton.
Intersections from east to west:
IL140 begins in the east US40/ US51/ IL185 at Vandalia
US40 near Mulberry Grove
IL127 joins from the south at Greenville
IL127 leaves to the north
IL157 at Hamel
IL111 joins from the south by Bethalto
IL140 has an interchange with IL3 where IL111 follows IL3 north
IL140 ends in Alton at IL143 just a block east of that route's western end at US67.
It passes through these towns: Vandalia, Mulberry Grove, Greenville, Alhambra, Hamel, Bethalto, Alton.
