Motorway tunnelsMaintenance and cleaning work scheduled from 18 March to late May 2025

This campaign focuses on preventive and corrective maintenance of safety equipment, but also on extensive cleaning.

The majority of the work will be carried out at night to minimise traffic disruption, and the campaign is scheduled to end in late May. The autumn campaign, on the other hand, is set to run between early September and November.

The main objective is to verify the proper functioning of essential safety systems, including:

• Ventilation systems
• Fire detection and suppression equipment (smoke detectors, fire extinguishers, hydrants)
• Emergency communication devices (SOS niches, emergency call stations)
• Lighting systems (tunnel lighting, guidance lighting, emergency lighting)
• Traffic monitoring and control systems (video surveillance, automatic incident and smoke detection)
• Structural and electrical components (civil engineering checks, transformers, backup generators)
• Water management systems (retention basins, oil-water separators, pumps)

The following tunnels and crossings will undergo cleaning and maintenance during this period:

Grouft, Rëngelbour, Stafelter, Gousselerbierg, Mersch, Roost, Colmar-Berg, Schieren, Howald, Cents, Richard Serra, Kirchberg, Saint-Esprit, Pénétrante-Sud, Merl, Pétange-Eglise, Biff, Secondary Access in Esch-Belval, Micheville, Aessen, Ehlerange, Foetz, Frisange, Mondorf, and Markusberg.

Schedule

The maintenance work will take place first, followed by cleaning operations from mid-May onward. The final phase of cleaning is scheduled from May 29 to May 30, when the Howald and Cents tunnels will undergo their last round of maintenance.

For detailed schedules of interventions per tunnel, motorists can refer to the official website of CITA at www.cita.lu.

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© Administration des ponts et chaussées