Argentina: Ridership and standard specifications of rolling stock on the Buenos Aires commuter rail network December 7, 2023 | Data & Statistics Buenos Aires’ commuter rail system comprises seven rail lines – Mitre, Belgrano Norte, Belgrano Sur, Roca, San Martín, Sarmiento, and Urquiza. The system is operated by state-owned company Operadora F... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password