Overview

• TMB confirms the Verdaguer–Maragall stretch is back in service as the initial phase of works concludes.
• From September 1 to 7, the Maragall–Trinitat Nova segment and L11 between Trinitat Nova and Casa de l’Aigua remain closed with replacement buses.
• TMB forecasts full normal service on L4 and L11 on September 8, aligned with the start of the school year.
• The €20 million TMB works include six kilometers of new concrete track, anti‑vibration rail fixings, new interlockings, four renewed track devices, and a Guinardó shaft slated to become a ventilation gallery.
• A separate €62 million signalling modernization led by the Generalitat continues through 2029, with a concentrated L4 shutdown between Urquinaona and La Pau planned around December 6–8.