Two major rail signalling projects in São Paulo will improve mobility after Alstom and Siemens Mobility secured major contracts.
Alstom will implement the signaling system for CPTM’s new Mauá Norte depot, while Siemens Mobility will digitize the extension of Line 4-Yellow of the São Paulo Metro, one of the most advanced automated systems in Latin America.
Alstom Installs Signalling for the New Depot
Alstom has signed a contract with Companhia Paulista de Trens Metropolitanos (CPTM), the operator of suburban and metropolitan trains in the São Paulo region, to supply and implement the complete rail signaling system for the new Mauá Norte depot, part of Line 10 (Turquoise). The depot, located between the Mauá and Capuava stations, includes six new tracks for shunting, train formation, and stabling trains outside of operating hours.
The project involves the delivery, installation, testing, and commissioning of a complete signaling system, including electronic interlocking, track-side equipment for switch control, light signals, and track occupancy detection, all designed to SIL 4 safety standards. The solution will also include auxiliary subsystems such as video surveillance, access control, telecommunications infrastructure, and radio communications dedicated to railway operations.
According to the company, the new system will improve safety and operational efficiency by providing better control over train movements, real-time visibility of track occupancy, and more efficient train allocation. The work will take 18 months, and upon completion, Alstom will monitor operations for an additional six months; the contract also includes a two-year warranty.
Siemens Mobility digitalizes the extension of Line 4-Yellow
Siemens Mobility has been selected by Motiva, the company responsible for the extension of Line 4-Yellow in São Paulo, to equip the section with the latest signaling technology. The project marks the first extension of this line beyond the city limits and adds 3.3 km of double-track tunnel, connecting the current terminus at Vila Sônia-Prof. Elisabeth Tenreiro to the new Taboão da Serra terminal.
The extension will increase the line’s total length to 16.1 km and will include two new stations, Chácara do Jockey and Taboão da Serra. The new Taboão da Serra station will become the first metro station in São Paulo located outside the city limits, and the project is estimated to serve approximately 110,000 passengers per day and benefit over 280,000 residents in the region.
Siemens Mobility will supply a complete signaling package, including the Trainguard MT CBTC system, electronic interlocking, telecommunications, operational supervision, and GoA4-level automation. Line 4-Yellow, the first fully automated, driverless line in Latin America, already carries approximately 740,000 passengers daily and operates at intervals of just 90 seconds, with punctuality and availability approaching 100%.
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