To make a better connection between the ARBED works of Belval and that of Differdange, a new line was created under mount Soleuvre. In this line there is a tunnel of 1100 meters. Because of this new line the ARBED internal transport did not have to pass the CFL tracks between Belval and Differdange. In 1995 connection of about 800 meters was made to another industrial estate (Kronospan).
Around 1985 plans existed to make a new public railway line (for the CFL) from Pétange via this tunnel to the area of Belval-Usines. Plans existed to share the ARBED-owned line and traffic of the CFL. In this plans the old line from Differdange via Belval-Rédange, Belvaux-Soleuvre to Belval-Usines would be abandoned. But plans changed, and the new line was no more in the picture. The allready aquired area for the new line has now been converted into a roadway from Soleuvre to Pétange.
The line is in use today.
| Length | : | 4,6 km |
| Opened | : | 4-3-1974 |
| Track width | : | 1435 mm |
| Electrified | : | No |
| Closed | : | In use |