Siemens Mobility to supply signalling and automation for São Paulo metro extension
Siemens Mobility will provide signalling and automation technology for the extension of São Paulo's Line 4-Yellow metro. The project adds 3.3 km of track and two new stations, taking the line beyond city limits for the first time.

Siemens Mobility has been contracted to supply advanced signalling and automation technology for the extension of São Paulo's Line 4-Yellow metro line in Brazil. This line is notable for being Latin America's first fully automated, driverless metro.
The extension will add 3.3 kilometers of double-track tunnels and two new stations, extending the line from Estação Vila Sônia-Profª Elisabeth Tenreiro to Taboão da Serra. This marks the first time Line 4-Yellow will operate outside São Paulo's city limits, aiming to improve connectivity for over 280,000 residents in the region. The new section is projected to serve approximately 110,000 passengers daily.
Siemens Mobility will deliver a comprehensive package including its CBTC (Communications-Based Train Control) technology, Trainguard MT, electronic interlocking systems, telecommunications, and Grade of Automation 4 (GoA4) for the highest level of automated train operation. This upgrade is expected to reduce the journey time between Estação da Luz and Taboão da Serra to around 26 minutes and supports the metropolitan area's goals for decarbonisation and efficient urban mobility.
The existing Line 4-Yellow already utilizes Siemens Mobility technology and has achieved near 100% punctuality and availability rates. The extension will bring the line's total length to 16.1 kilometers and introduce the Taboão da Serra station as the first São Paulo Metro station outside the city boundaries. Siemens Mobility is a component of Siemens AG, providing intelligent transport solutions worldwide.