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The Luxembourg Administration of Bridges and Roads has announced the second biannual campaign of maintenance and cleaning of motorway tunnels starting from Monday 1 September 2025.
The maintenance process involves both preventive and corrective work on safety equipment, such as cleaning tunnel walls, testing the functioning and interaction of different systems and reporting alarms to CITA. According to the administration, the operation is essential to guarantee road safety, ensure the reliability of infrastructure§ and reduce the risk of unscheduled closures.
Depending on each tunnel's size and complexity, as well as traffic conditions and coordination with nearby worksites, most interventions will take place overnight.
The list of tunnels involved are as follows: Grouft, Rëngelbour, Stafelter, Gousselerbierg, Mersch, Roost, Colmar-Berg, Schieren, Howald, Cents, Richard Serra, Kirchberg, Saint-Esprit, Pénétrante-Sud, Merl, Pétange-Église, Biff, the secondary access to Esch-Belval, Micheville, Aessen, Ehlerange, Foetz, Frisange, Mondorf and Markusberg.
The works will concern a wide range of equipment, including but not limited to: ventilation, fire detection systems, CO/opacity sensors, foam extinguishers, SOS niches, tunnel and emergency lighting, sound systems, radio retransmission, video surveillance, automatic incident and smoke detection, signage, fire hydrants, road surface, civil engineering structures, transformers, generators, pumps, gallery boosters, retention basins and associated IT and communication networks.
A detailed schedule for every tunnel is available on the CITA website: www.cita.lu.
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