Barcelona’s Metro Line 4 is back in full operation from Monday, 8 September, coinciding with the start of the school year, after more than two months of engineering works between Verdaguer and Trinitat Nova.

The 6km track replacement is complete / WikiCommons

The upgrade has seen six kilometres of track replaced, signalling modernised and a new escape route added at Maragall. The project also restored the L11’s service between Trinitat Nova and Casa del Aigua. Earlier, the section between Verdaguer and Maragall reopened at the beginning of September.

The work began on 25 June and involved replacing the traditional ballast trackbed with a concrete platform — a change that will simplify maintenance and improve ride comfort. The total bill was €30 million: €20 million covered by TMB for the track renewal and €10 million contributed by the Catalan Government for the new signalling and additional infrastructure.

The €30m track upgrades have been ongoing since 25th June / WikiCommons

Laia Bonet, deputy mayor and chair of TMB, thanked residents for their patience, stressing the works were ‘absolutely necessary’ to guarantee a more reliable service.

To mark both the completion of the works and the Metro’s centenary, TMB will hold open days across several historic and technical sites. Highlights include rare visits to the network’s two ‘ghost stations’: Gaudí, never opened, and Correos, closed in 1972 and recently refurbished as part of the L4 works.

Visits to Correos will be conducted at night, outside service hours. Other behind-the-scenes locations include the Metro Control Centre, workshops at Santa Eulàlia and ZAL, the Mercat Nou substation, the original staircase at Urquinaona, and the simulator hall at Plaça Catalunya.

A total of 5,000 free tickets will be available from 9 September via the dedicated website obrimelmetro.cat. Activities will run from September to November, offering the public a rare glimpse into the city’s underground network.

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Source: El Nacional