New construction of the Limmattal light rail line

The Limmattal light rail line should provide a sustainable solution to the traffic problems in the Limmattal region and ensure that there is the required capacity in public transport.

About the project

The Limmattal is one of the fastest-growing regions in the greater Zurich/Aargau area. The region is already overloaded with traffic. This pressure will increase greatly in the coming years, fuelled by the construction of new neighbourhoods where new housing will be built and new jobs created.

From the end of 2022, the Limmattal light rail line will operate as part of the Zürcher Verkehrsverbund (ZVV) between the stations of Zurich-Altstetten and Killwangen-Spreitenbach in the canton of Aargau. The line connects the western part of the city of Zurich with the communities of Schlieren, Urdorf, Dietikon, Spreitenbach and Killwangen. Along the 13.4 km long route, 27 stops have been built.

The Limmattal light rail line was implemented jointly by the cantons of Zurich and Aargau. For the planning and construction of the infrastructure, they founded Limmattalbahn AG in 2010. The operator of the light rail line is Aargau Verkehr AG.



Our contribution

Initial work for the new construction started back in 2010. In the preliminary project, construction and project approval phases, Enotrac was responsible for the electrical systems within the cross-sectional mandate of railway engineering. This included preparation of the preliminary project plan, in particular for the traction supply and its integration into the VBZ and AVA network. Based on this, the construction plan was developed and preparation of the PGV dossier including the safety report was supported.

In the tendering and implementation phases, Enotrac took on the responsibility of overall management and construction site management as the client’s representative. Within the overall project management for the Limmattal light rail line, Enotrac was also responsible for all electrical systems.

The tasks at a glance:

  • Preparation of tenders for railway engineering contractors and planners for the implementation phase, including negotiations
  • Overall management and construction site management as well as coordination of railway technology and civil engineering during SIA phases 51, 52 and 53, including planning and management of commissioning
  • Process management of system optimisations for the electrical systems and telecontrol technology, as well as coordination with BAV
  • Preparation of the operating concept and definition of the Müsli depot safety systems, including PGV, monitoring of implementation and acceptance
  • Development of speed signalling including risk analysis and application for exemption permits
  • Preparation of overall safety certificate for obtaining the operating permit, including coordination with BAV
  • Management of defects and conditions.


Some figures from the project

Total Costs
Length of the laid rails
Minutes travel time for the journey through the Limmatal

Enotrac was able to contribute its expertise in the overall management of complex projects to the new construction of the Limmattalbahn. This includes in particular the comprehensive know-how in all technical areas of railway operation as well as the coordination of the numerous companies involved.

The Limmattalbahn will now go into scheduled operation at the end of 2022.

  • Customer

    Limmattalbahn AG

  • Period

    2010 – 2022

  • Location

    Limmattal, Switzerland

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