The first phase of the joining of the trams corresponds to the Verdaguer-Glòries section. In March 2021, Barcelona City Council completed the processing of the two urbanisation projects for the first phase of connecting the trams along Diagonal and the works began in March 2022.

The work involved the installation of all the necessary systems for the circulation of the tram, from Glòries to Carrer de Girona, the urbanization of Avinguda Diagonal and the arrangement of the sea side of Parc de les Glòries. This action has involved the reorganization of the current uses of these spaces. Also the reduction of private motorized traffic, improving and expanding pedestrian space, cycling space and green areas.

1. The urbanization of the Diagonal

The works on the tram must also allow the Diagonal to be redeveloped, giving more space to pedestrians and sustainable mobility. Thus, the configuration of the Diagonal in this first phase, has been as follows:

Between Passeig de Sant Joan and Carrer de Lepant: the tram platform has been installed in the central trunk, a 4-meter bidirectional bike lane has been built and side sidewalks have been extended (which have gone from 3 to 7.5 meters). Private traffic has been reduced to two lanes in each direction, which are located on the sides of the avenue.

Between Carrer de Lepant and Carrer de los Castillejos: the Rambla has been maintained and the side green strips have been extended; the mountain side road has the lane for the tram, for the passage of services and a bike lane; the sea road has the tram lane and one more for private vehicles. The sidewalks have been extended from 3 to 7.5 meters.

2. The new Parc de les Glòries

The urbanization of the entire side of the Parc de les Glòries includes the section between the streets of Cartagena and Badajoz. This has involved the construction of the new transport interchange for the T4, T5 and T6 lines of the tram, various urban and interurban bus lines and the exchange with the Glòries stop on metro line 1.

The park has gained three nodes of biodiversity to facilitate the mobility of the species that make up the ecosystem of Les Glòries and gardens around the accesses of the metro station of Glòries (L1).

The final urbanization will be carried out in conjunction with the urbanization project for the coverage of Gran Vía, which will define the location of the future tramways in both Diagonal and Gran Vía.

The second phase of the joining of the trams corresponds to the section Passeig de Sant Joan- Avinguda Sarrià. The City Council has initially approved the projects to end the connection of the tram along Diagonal, between Verdaguer and Cinc d’Oros, to continue the renewed section of phase 1, with wider sidewalks, and a central trunk with the tram platform and a high-capacity bidirectional bike lane.

The connection of the Trambaix and Trambesòs networks is one of the key projects for the future of the city to increase the offer of public transport and reduce dependence on private vehicles, as established in the City Council's Urban Mobility Plan for the coming years. Action will be carried out in three different sections: between Verdaguer and Cinc d’Oros, between Cinc d’Oros and Francesc Macià, and between Francesc Macià and Avinguda de Sarrià. The aim is to transfer 250,000 daily journeys for work that are carried out today by private vehicle to public transport.

The main objective of the executive project of the redevelopment of Avinguda Diagonal is to complete the transformation of one of the most emblematic roads in the city into a metropolitan axis of sustainable mobility, pedestrian space and urban greenery.

Between Passeig de Sant Joan and Passeig de Gràcia

This section continues with the redevelopment already carried out in the immediately preceding section, between Passeig de Sant Joan and Carrer de Sardenya. The entire avenue will be renewed from façade to façade with a section that places the tramway platform and the bike lane in the central trunk, separated by a parterre. The current sidewalks of only 2 meters in some sections are extended to about 7.5 meters, which means a notable gain for pedestrians. Motor traffic is reduced to two lanes in each direction and is located on the sides, of 5.20 meters, between two rows of trees. In this area there will be the Diagonal – Cinc d’Oros stop, between Passeig de Gràcia and Carrer de Pau Claris.

Between Passeig de Gràcia and Plaça de Francesc Macià

In this area, the project reserves the intervention in the central trunk of the Diagonal, maintaining the 7.5-metre pavements renewed and extended in 2015. The configuration of the central trunk will give continuity to the previous section incorporating the tram and the bike lane, and the sides will have two traffic lanes, losing the unidirectional bike lanes that run today. In this area there will be two tram stops, in Balmes and Casanova. Also in this area, a shared bus and tram platform will be enabled between Via Augusta and Passeig de Gràcia.

Between Plaça de Francesc Macià and Avinguda de Sarrià

In this third section, three specific redevelopment interventions are planned to carry out the connection with the Trambaix, where today the terminal station is located on the Diagonal, next to the square Llobregat. On the one hand, the perimeter of the square will be reformed to renew the sidewalks, put new trees and modify the existing bidirectional bike lane around the entire square. The tramway is planned on the sea side of the square. The project also foresees the reform of the stop, so that it becomes an interchange of urban and interurban buses and the tram.

And to connect the new configuration of lanes with the existing one in the Diagonal, between Sarrià Avenue and Fra Luis de Granada, it is planned to implement a vehicle pass that will redirect private traffic in the direction of the entrance from the central trunk to the side.