It has been a difficult commute for Northbound I-55 motorists trying to make their way from Montgomery County to Sangamon County.  Icy conditions have sent many vehicles off the road, including a semi into the median and a bus (non school bus) flipped onto its side.  12 occupants were transported to a local hospital with non-life-threatening injuries. The remaining seven occupants were transported off the interstate to a safe location by the ISP. All lanes are open, but the bus will be removed later this afternoon, when roadway conditions improve.