Trenes Argentinos operated the Sarmiento train line with limited service during specific dates in 2026 to allow for infrastructure renovations [1].
These disruptions affect one of the most heavily used rail lines in the metropolitan area, impacting thousands of daily commuters who rely on the connection between western suburbs and the city center.
The operator said that the service was reduced during the weekend of June 6 and 7, 2026 [1]. According to MinutoUno, the affected stretch during this period was between the Once and Merlo stations [1]. However, Infobae reported that the integral signaling renovation focused on the section between Merlo and Paso del Rey [1].
This project includes the comprehensive renovation of tracks, and signaling systems. The work also involves the construction of two under-track crossings to improve safety and traffic flow [1].
Earlier in the year, similar limitations occurred on Sunday, March 8, 2026 [1]. Trenes Argentinos Operaciones (SOFSE) said the train would not reach Once on that day until 20:00 hours [1].
"The Sarmiento train will operate with limited service during the weekend due to works," Trenes Argentinos said [1]. The company said that the service would circulate in a reduced manner between Once and Merlo during the June 6 and 7 dates [1].
Commuters were advised to plan for alternative transportation during these windows of limited availability. The company said that these measures are necessary to ensure the long-term stability and safety of the rail infrastructure [1].
“The Sarmiento train will operate with limited service during the weekend due to works.”
The repeated service interruptions on the Sarmiento line highlight the critical need for infrastructure modernization in Argentina's rail network. By prioritizing signaling upgrades and the construction of under-track crossings, the operator aims to reduce systemic delays and improve safety, though the immediate cost is a temporary reduction in reliability for the workforce commuting into Buenos Aires.
