Illinois State Route 15 runs east-west across St. Clair County. At Belleville, this highway becomes a multi-lane divided highway. Most of it is a expressway, with the exception of a few driveways and a stoplight near Belleville. IL St Rt 15 passes through the following towns in St. Clair County. St. Libory
Fayetteville
Freeburg
Belleville
Centreville
Alorton
East St. Louis
IL St Rt 15 is multi-plexed in St. Clair County. Illinois State Route 4, from near St. Libory to Fayetteville.
A junction marker on SB IL St Rt 4/EB IL St Rt 15 near St. Libory. SB IL St Rt 4/EB IL St Rt 15 near St. Libory. SB IL St Rt 4/EB IL St Rt 15 near the Kaskaskia River in Fayetteville. EB IL St Rt 15 west of Fayetteville. WB IL St Rt 13/15 near Greenmont Road. WB IL St Rt 13/15 east of Belleville. WB IL St Rt 15 west of the split with IL St Rt 13. A St. Clair County mile marker. WB IL St Rt 15 near IL St Rt 159. WB IL St Rt 15 near IL St Rt 13 on the westside of Belleville. A BGS on WB IL St Rt 13. BGS's on EB IL St Rt 15. WB IL St Rt 15 near the Shrine in Belleville. WB IL St Rt 15 near the shrine in Belleville. A BGS at the shirne. WB IL St Rt 15 at IL St Rt 157. A BGS on NB IL St Rt 157. A BGS on SB I-255/WB U.S. Rt. 50. A BGS on SB I-255/WB U.S. Rt. 50. The western end of IL St Rt 15. The western end marker. IL 13/15 re-built Freeburg-to-Belleville WB IL 13/15 on the northside of Freeburg. (September, 2007) WB IL St Rt 13/15 at the eastern end of the work zone. (August, 2006) WB IL St Rt 13/15 at the point above. (April, 2007) WB IL St Rt 13/15 at the point above. (September, 2007) The new EB lanes will be to the left of the current lanes. (August, 2006) At the top of the hill in the photo above the road-way will shift. WB lanes will be to the right of the current lanes. (August, 2006) The new WB lanes are to the right. (April, 2007) WB IL St Rt 13/15 at the point above. (September, 2007) WB IL St Rt 13/15 in the work zone. The new WB Lanes are to the right. (April, 2007) WB IL St Rt 13/15 near the eastside of the sharp curve. This is being streched out. (August, 2006) WB IL St Rt 13/15 at the curve. (April, 2007) WB IL St Rt 13/15 at the point above. (September, 2007) WB IL St Rt 13/15 in the middle of the curve. (August, 2006) WB IL St Rt 13/15 at the point above. (September, 2007) WB IL St Rt 13/15 near the western end of the work zone. (April, 2007) WB IL St Rt 13/15 at the west end of the work zone. (September, 2007)
