The collision occurred at 06:46:56 CET (05:46:56 UTC) on the single-track Mangfall Valley Railway (German: Mangfalltalbahn) on a curve between the stations of Kolbermoor and Bad Aibling-Kurpark close to the Bad Aibling sewage works in Bavaria.
As of 11 February 2016, a total of 11 people had died, including several railway employees.
In total 85 people were injured; 24 injured seriously and 61 injured less seriously.
A twelfth victim died from his injuries two months after the accident.

The two trains were Stadler FLIRT3 multiple-units, operated under the Meridian brand by the Bayerische Oberlandbahn (BOB), a subsidiary of Transdev Germany.
The eastbound train was a six-car unit with 333 seats (ET 325), scheduled to run from Munich to Rosenheim, while the westbound train was a three-car unit with 158 seats (ET 355), scheduled to run from Rosenheim to Holzkirchen.
There were more than 150 passengers on board the two trains, considerably fewer than usual because of Carnival Holidays.
The trains were equipped with a total of three train event recorders.
The line and both trains were equipped with the Punktförmige Zugbeeinflussung (PZB) train protection system, which was designed to reinforce line-side signalling and prevent drivers from accidentally passing signals at danger.

The eastbound and westbound trains were scheduled to pass each other at Kolbermoor railway station, with the westbound train (M 79506) towards the direction of Munich timetabled to wait for five minutes for the eastbound train from Munich (M 79505) to arrive.
The westbound train departed Kolbermoor on schedule but the eastbound train was four minutes behind schedule.
One train was travelling at 52 kilometres per hour (32 mph) and the other at 87 kilometres per hour (54 mph).
The collision occurred at 06:46:56 CET (05:46:56 UTC) on the single-track Mangfall Valley Railway (German: Mangfalltalbahn) on a curve between the stations of Kolbermoor and Bad Aibling-Kurpark close to the Bad Aibling sewage works in Bavaria. As of 11 February 2016, a total of 11 people had died, including several railway employees. In total 85 people were injured; 24 injured seriously and 61 injured less seriously. A twelfth victim died from his injuries two months after the accident.
The two trains were Stadler FLIRT3 multiple-units, operated under the Meridian brand by the Bayerische Oberlandbahn (BOB), a subsidiary of Transdev Germany. The eastbound train was a six-car unit with 333 seats (ET 325), scheduled to run from Munich to Rosenheim, while the westbound train was a three-car unit with 158 seats (ET 355), scheduled to run from Rosenheim to Holzkirchen. There were more than 150 passengers on board the two trains, considerably fewer than usual because of Carnival Holidays. The trains were equipped with a total of three train event recorders. The line and both trains were equipped with the Punktförmige Zugbeeinflussung (PZB) train protection system, which was designed to reinforce line-side signalling and prevent drivers from accidentally passing signals at danger.
The eastbound and westbound trains were scheduled to pass each other at Kolbermoor railway station, with the westbound train (M 79506) towards the direction of Munich timetabled to wait for five minutes for the eastbound train from Munich (M 79505) to arrive. The westbound train departed Kolbermoor on schedule but the eastbound train was four minutes behind schedule. One train was travelling at 52 kilometres per hour (32 mph) and the other at 87 kilometres per hour (54 mph).
Bad Aibling rail accident