Barcelona's urbanism commission has definitively approved two projects to connect the tram along Diagonal avenue, from Verdaguer to Francesc Macià. Deputy mayor Laia Bonet warned that the project depends on the Catalan government's budget. The approval received votes from PSC, Comuns and ERC.
On March 17, 2026, Barcelona's urbanism commission definitively approved the executive project for an underground collector and the reurbanization of Diagonal avenue. These projects enable the tram connection from Verdaguer, where it currently ends, to Francesc Macià square. The approval passed with votes from mayor Jaume Collboni's PSC government and allies Comuns and ERC, while Junts, PP, and Vox voted against in some cases; the collector was approved by all except Vox, per eldiario.es.