Vienna U2/U5 Metro Expansion Project Profile

The U2/U5 metro expansion is a landmark infrastructure project designed to enhance Vienna’s public transport capacity and introduce advanced automation. This initiative involves the strategic extension of the U2 line and the construction of the city’s first fully automated metro line, the U5, addressing future ridership demands and improving network connectivity across the Austrian capital.

Technical Specifications

The project’s engineering scope is distinguished by two primary components. The U2 line extension involves complex deep-level tunnelling, with stations constructed at depths of 30-35 meters—the deepest in Vienna’s network. This design minimizes surface disruption during construction and integrates the new 20-kilometer southern route, which terminates at Wienerberg, with existing lines U3, U4, and the new U5. In parallel, the 5-kilometer U5 line introduces Grade of Automation 4 (GoA4) driverless operation to Vienna, a first for the city. This required the implementation of advanced Communication-Based Train Control (CBTC) signalling and platform screen doors at all eight stations to ensure safe and efficient automated service.

Both lines are serviced by a fleet of 34 Siemens Type X metro trains, with an option for an additional 11 units. These six-car trains are designed for high capacity, accommodating up to 928 passengers. They feature a lightweight, open-gangway design for improved passenger flow and are equipped with the FGI Plus dynamic passenger information system. The rolling stock incorporates energy-efficient technologies, including LED lighting and intelligent HVAC systems, and is supported by a 24-year maintenance contract with Siemens to ensure long-term operational reliability.

Key Takeaways

• Strategic Capacity Enhancement: The expansion directly addresses Vienna’s projected population growth, significantly increasing network capacity and reducing congestion on key transport corridors.
• Technological Advancement: The U5 line establishes a new benchmark for public transport in Vienna as its first fully automated metro line, promising enhanced operational efficiency, frequency, and safety.
• Complex Urban Engineering: The construction of the U2 extension’s deep-level stations showcases advanced civil engineering solutions to integrate major new infrastructure within a dense urban environment with minimal surface impact.

Frequently Asked Questions

When will the new Vienna metro lines be fully open?

The new U5 line became operational in 2025. The full extension of the U2 line is scheduled to be completed and operational by 2027, finalizing this major phase of Vienna’s metro expansion.

Who are the main companies building the Vienna U2 and U5 lines?

The project is a collaboration led by the public transport operator Wiener Linien. Key contractors include Siemens for the supply and maintenance of the 34 fully automated Type X metro trains, YF Architects for the U2 line design, Franz Architekten for the U5 line design, and IGT for specific construction lot engineering.