Dac.0049.2026 - Interventions To Adapt The Shape Of The Colle Porcina Tunnel, Sella Delle Vetiche Tunnel, Contrafforte Ferrazzano Tunnel And Additional Interventions At The Colle Serrano Tunnel And San Salvatore Tunnel, Colle Alto And Colle Barone Of The Baranello-Campobasso Railway Section Of The Roccaravindola-Isernia-Campobasso Line.