During the night of 27–28 April 2026, the BSA/EES systems at the Flonzaley Tunnel were commissioned as part of the Upn N09 Vennes–Chexbres project.
Work on the BSA/EES systems began in 2020 with the laying of cables, continued in 2024 with the commissioning of the systems, and has now culminated in their entry into service. We would like to thank all staff members for their valuable contribution and for ensuring that operations ran smoothly.
