Overview
- Trenes Argentinos will halt the Tigre branch from Saturday, September 20, through Tuesday, September 23, with normal service slated to return on Wednesday, September 24.
 - The José León Suárez and Bartolomé Mitre branches will run only between Belgrano R and their outer terminals during the same window, without reaching Retiro.
 - Works include full track renewal and signal reconnection at Acassuso, third-rail installation and control integration at Beccar, and fiber-optic installation with signaling migration between Tres de Febrero and Colegiales.
 - These interventions form part of a two‑year plan that targets 40 km of new track, 47 km of third rail, upgrades at crossings and structures, and follow more than 12 km already renewed by Trenes Argentinos Infraestructura.
 - Long‑distance trains to Rosario, Córdoba and Tucumán will operate normally, and passengers are advised to check the official portal or app for updates and listed alternative routes.