In line with its commitments to establishing greener infrastructure, the Monaco Government will continue its extensive lighting replacement and modernisation project in tunnels across Monaco throughout 2025. The works will require a series of closures and diversion routes, with three tunnels set to close to the public for a month starting on 6th January.
Since 2021, the Urban Development Directorate of Monaco (DAU), which operates under the Department of Equipment, Environment and Urban Planning, has been systematically replacing outdated fluorescent and sodium lamps in the Principality’s tunnels with advanced LED lighting systems.
These LED lights are significantly more energy-efficient and environmentally sustainable, boasting lifespans of 80,000 to 100,000 hours. This upgrade will dramatically reduce energy consumption and minimise the need for frequent replacements, as the new equipment requires renewal only once every decade.
Following the successful completion of lighting upgrades in the Sainte-Dévote-Débarcadère and Digue tunnels, the DAU is extending its campaign to the entire Dorsale underground network. To carry out this work, various tunnels will be closed on a rolling schedule between 9.30pm and 6am, based on a set calendar from 6th January to 4th August.
The first phase, running from 6th January to 5th February, will involve the closures of the Rocher Nice tunnel under the Rocher, the Rocher tunnel and the Canton tunnel.
The second phase, scheduled from 10th February to 28th February, will see the closure of the Colle, Dorsale, Hélios, Fontvieille descent and Rocher Nice tunnel under the Rocher.
The final phase, taking place between 16th June and 4th August, will include the closure of the Dorsale tunnel, Canton tunnel (T2ter) and Larvotto tunnel.
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Photo source: Monaco Communications Department