The Ballymacarrett rail crash occurred on 10 January 1945 at 7:50am in the Ballymacarrett area of Belfast, County Down, Northern Ireland on the Belfast to Bangor Line of the Belfast and County Down Railway, when a train led by a heavy autotrain driving trailer ran into the back of a stopped passenger train consisting of lightweight wooden coaches. 22 died with 27 injured. It was the worst crash in Northern Ireland since 1889. The cause was found to be carelessness of the driver of the autotrain (also called a railmotor) who was running too fast for conditions. Fog, unsafe railway rules, and possible distraction from passengers all may have contributed to the accident. Old lightweight rolling stock contributed to the great number of injuries and deaths. The accident led to the demise of the