(Collinsville)--One person suffered life threatening injuries following a two vehicle accident Tuesday morning on Interstate 255. According to Illinois State Police, a vehicle driven by 25 year old Justin Butler of Bunker Hill turned the wrong way onto the exit ramp from Interstate 255 and Gateway Commerce.

Butler started to travel northbound on the interstate in the southbound lanes, and struck a Madison County transit bus driven by 79 year old Edward Smith of Godfrey head on.

Butler was airlifted by ARCH helicopter to St. Louis University Hospital for treatment of life threatening injuries. Smith was taken by ambulance to Anderson Hospital in Maryville for treatment of minor injuries. An investigation into the accident is ongoing.