The government commission has given its approval for the project which budget of over 17 million euros. It will get under way at the end of 2024 and should take just over a year. The work at Catalan city entails resurfacing, treating structural pathologies, improving weatherproofing and drainage and renewing a significant part of the fixtures. The work also includes replacing lighting with LED technology, plus new automated ventilation cycles adapting to various scenarios.

https://www.barcelona.cat/infobarcelona/en/revamp-to-the-tunel-de-la-rovira-to-improve-safety-and-efficiency_1388919.html