On July 21, 2012, about 3:30 p.m. central daylight time, Kansas City Southern Railway Company (KCS) freight train QSHKC20 collided with the side of BNSF Railway (BNSF) freight train EMHSEBM088 at a railroad crossing near Arcadia, Kansas. At the time of the collision, the BNSF train was traveling about 35 mph and the KCS train was traveling about 31 mph. The temperature at the time of the accident was 92°F and the weather was clear.
The National Transportation Safety Board determines that the probable cause of the accident was the failure of the train crew of Kansas City Southern Railway Company freight train QSHKC20 to comply with trackside signal indications. Contributing to the accident was the lack of a positive train control system that could have stopped the train, thereby preventing the accident.