What is Bad Aibling rail accident?
{{unsourced|date=July 2021}} [[File:Eisenbahnunfall von Bad Aibling.png|thumb|500px|The accident of the railway in Mangfall Valley,<br />marked with a yellow star in OpenStreetMap]] The '''Bad Aibling rail accident''' was an [[accident]] that happened on the [[railway]] line in [[Bad Aibling]] in [[Bavaria]], [[Germany]], on 9 February 2016. Twelve people were killed and many more injured when two trains collided head-on, along a single-track line. == The line == The accident happened on the line between [[Holzkirchen]] and [[Rosenheim]], in Bavaria, southeastern Germany. The whole line only has a single [[Railway track|track]]. Trains usually cross at stations. The line is equipped with a security system that functioned normally at the time of the accident. In addition, it has been equipped with [[GSM-R]], in 2007. In some places on the line, autonomous [[block signal]]s are used to secure the track. The line is controlled by different human controllers. The control station responsible for the section where the accident happened is in Bad Aibling. The whole infrastructure had been checked a week before the accident, and was found to be without fault. == Crash == [[File:Kränze an der Stelle des Zugunglücks vom 2016-02-09 westlich von Kolbermoor, 1.jpeg|thumb]] One of the trains left [[Kolbermoor]] on schedule, and headed towards Holzkirchen, and entered the single track section. The other train was four minutes late. The accident happened because of human error. The person responsible gave the orders to pass by a signal, because he said the signal in question was broken. That meant that both trains were travelling on the same track, and headed towards each other. This was not apparent to the train drivers, because there is a long bend in the track, at that position. The person in charge in Bad Aibling recognised that he had made an error, and issued orders for emergency braking using GSM-R. The first of these was given 36 seconds before the collision. Because he did not use the correct keys, these orders did n