Final Phase of Tram Connection Works on Barcelona's Diagonal Tendered

The tender combines collector expansion and redevelopment into five lots, with service expected to start in 2031.

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Generic image of construction work in a city.

BIMSA, commissioned by the Barcelona City Council and the Metropolitan Transport Authority (ATM), has begun the tender process for the final phase of works to connect the tram along the Diagonal, between Verdaguer and Francesc Macià.

This project will increase public transport capacity, reduce reliance on private vehicles, and facilitate intermodality with the metro and bus network. The tender includes the expansion and doubling of the underground collector along the Diagonal, a crucial infrastructure in the context of climate emergency.
The tender merges the collector expansion and redevelopment projects, managed by the City Council, with the tram infrastructure project, managed by the ATM, into a single work divided into 5 lots.
The service is projected to become operational in 2031, enhancing sustainable mobility on the Diagonal from Zona Universitària to Verdaguer with increased public transport and cycle lanes.
Based on information from the official source: BIMSA - Barcelona d'Infraestructures Municipals (05/11/2026)