Illinois State Route 148 is a north-south highway in Southwestern Jefferson County. This runs from Mt. Vernon to the Jefferson/Franklin County Line. IL St Rt 148 passes through the following towns in Jefferson County. Mt. Vernon
Waltonville IL St Rt 148 is not multi-plexed in Jefferson County. IL St Rt 148 crosses the following highways in Jefferson County. Illinois State Route 37, at Mt. Vernon. Illinois State Route 142, at Mt. Vernon. Interstate 57, at Mt. Vernon. (NO INTERCHANGE) Interstate 64, at Mt. Vernon. (NO INTERCHANGE)
A junction marker on NB IL St Rt 37. SB IL St Rt 148 east of IL St Rt 37/142. The northern end marker.
