Overview
- Service on the Tigre branch will be fully halted for nearly 50 days, while the J. L. Suárez and Bartolomé Mitre branches will run only to Belgrano R without entering Retiro.
- Crews will renew 7.7 km of hard‑to‑access track, replace third‑rail components, and complete finishing works to raise operating speeds on previously intervened sections.
- Retiro’s century‑old signaling will be removed and a modern system installed with dynamic testing, requiring a full power cut that prevents electric trains from reaching the terminal.
- Officials say continuous works now will avoid tripling the total timeline compared with staggered closures, with summer chosen due to lower ridership.
- The intervention forms part of the national rail emergency program targeting 40 km of track renewal, 47 km of third‑rail replacement, and multiple level crossing and bridge works, with alternative travel options published for affected users.