The tram along Diagonal will begin construction in Barcelona in summer 2027

Mayor Jaume Collboni has confirmed that the works to connect the tram along Diagonal will begin in summer 2027. The Government Commission has approved a budget of €120 million.

A budget of €120 million initiates the connection of the tram along Diagonal Avenue. This was explained by the mayor, Jaume Collboni, in an interview on the Aquí Catalunya programme on Ser Catalunya, following the approval of the allocation by the Government Commission this Thursday.

According to the mayor, the tender for the works will be published in three weeks. If everything goes as planned, construction will start in summer 2027, after the municipal elections.

“We will leave everything ready,” stated Collboni, who is facing the final stretch of his term.

The project includes three new stops at Diagonal-Cinc d'Oros, Balmes, and Casanova, as well as the adaptation of the interchange at Francesc Macià. The works also involve the redevelopment of public space over a stretch of 2.8 kilometres.

The project also includes the expansion and duplication of the collector on Diagonal Avenue, which will increase its capacity by 60%. According to the City Council, it is a basic infrastructure to make the city more resilient to climate emergencies.

“It’s a project that isn’t visible and costs a lot of money paid by the city council, but it is noticeable when there are downpours,” Collboni pointed out.

If the schedule is met, the works would be completed by 2031, that is, throughout the next term. The mayor has assured that there will then be a tram connecting Baix Llobregat with Barcelonès north continuously.

For residents, the change will be noticeable on Diagonal with more space for pedestrians, an additional 16,000 square metres, 18,900 square metres of green areas, and a 4-metre bidirectional bike lane, which will occupy a total of 8,700 square metres. The specific closures and diversions will depend on the construction plan set after the awarding.

The agreement defining the institutional framework for executing the works and operating the connection was approved in July by the Metropolitan Transport Authority and the City Council. The works will not begin until the tender is resolved.