A serious accident shut down part of the highway in Northern Kentucky last night. It involved a semi and a car. Police say the car hit the tractor trailer that was exiting 75 south in Erlanger onto Donaldson road. The investigation seems to show the truck driver suddenly changed course and tried to drive back across that difficult lane exchange. Three people in the car were taken to U.C. Med Center. No charges have been filed because the accident remains under investigation.