While driving on the freeway, I was getting over into the next lane. I was half way over and there was no one in front of, next to or behind me from any direction, I was traveling an open road. The closest vehicle to me was 2 lanes over and 5 to 6 car lengths behind me, my car began to beep rapidly and immediately activated the automatic emergency breaking system. It slammed on the brakes, jolting my 2 daughets and me forward. All 3 active seat belts locked and caused pain in my chest. There was not a car near me at all. It was a hard slam and then immediate release. I have not yet reported this to Kia, I have never had this happen to me, therefore, there has never been an inspection initiated by myseld of the ABS. There are no systems failure lamps or warning lights activated. If someone was behind me, we would have surely been rear ended. I am terrified to drive this vehicle now.