Analysis
The Luxembourger driver of TER 837 617 received an order to pass a red (stop) signal to enter the zone operated by freight train number 45 938, pulled by SNCF Class BB 37000 locomotive 37007 from the Thionville depot, which had entered the section as normal by passing a green signal.
The accident was due to a human signalling error on the Luxembourg side, according to information from the Luxembourg Minister of Transport on 15 October 2006.
The CFL accepted that the double-deck passenger train (class TER 2N NG), travelling from Luxembourg to Nancy, had passed a red signal with the authorisation of the head signaller at Bettembourg. The signaller had not followed procedure in its entirety, and had not confirmed with the signal box at Thionville that the way was clear, probably not considering the possibility of another train having been delayed (in fact, the freight train). The Bettembourg signal box thus authorised the TER train to proceed on the track past a red signal which had already cleared the freight train from the opposite direction.
Having realised the mistake, the signaller at Bettembourg triggered an alert by RST (Radio sol train, "Train Radio System"), which was not received by the driver of the passenger train. He then wanted to cut the electricity supply for the line, but this was not possible because of the different rail electrification systems of the two countries; moreover the Luxembourg train had already passed to the French side, and so was beyond the signaller's control.
Read more about this topic: Zoufftgen Train Collision
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