Only a single track was being used because of engineering works. The line was electrified at 25 kV AC, and equipped, between Thionville and Bettembourg, with BAL (, "automatic signal blocks") and IPCS (, "permanent counter-track installations") which allow trains to run in one or other direction, the signalling and the interlocking being preconfigured to achieve this. Both trains were equipped with safety systems, KVB (, "Speed control by beacons") on the French side and Memor II+ on the Luxembourg side, which in particular halts the train if it passes a stop signal.