Illinois Route 159 is a north-south highway in the Metro-East that extends into adjoining areas to the north and to the south. Its northern end is at Illinois 16 west of Gillespie, and the southern end is at Illinois 3 and Illinois 154 at Red Bud, Illinois.
From north to south, Illinois 159 gets its start at Illinois 16 west of Gillespie:
From north to south, Illinois 159 gets its start at Illinois 16 west of Gillespie:
Illinois 159 meets Illinois 138 at that route's western terminus...
Illinois 159 then crosses Illinois 140 in rural Madison County...
Approaching Edwardsville, Illinois 159 joins Illinois 143 eastward...
In Edwardsville, Illinois 159 straightens out to head south, crossing Illinois 157, and Illinois 143 turns easterly onto Illinois 157...
Illinois 159 has a diamond interchange with Interstate 270...
Illinois 159 crosses Illinois 162 near Maryville:
Leaving Maryville and entering Collinsville, Illinois 159 has an interchange with the Interstate 55/70 concurrency...
In Fairview Heights, Illinois 159 meets Interstate 64 with a full interchange...
Illinois 159 crosses Illinois 161 in Swansea:
Shortly after that, the expressway portion of Illinois 15 in Belleville connects to Illinois 159 via a diamond interchange...
North of Hecker, Illinois 156 comes from the east to join Illinois 159 south:
Shortly after that, in Hecker, Illinois 156 deviates to continue westward:
Illinois 159 reaches its southern end at a 4-way intersection in Red Bud, where Illinois 3 comes from the west and turns southerly, and where Illinois 154 begins to head east...
