Lausanne–Renens: engineering work on the flyover.

The flyover between Prilly-Malley and Renens is one of our most impressive structures. 

It combines durability and strength, integrating seamlessly into the urban environment. Its purpose is simple: to allow trains to pass over other railway tracks without interrupting other transport routes. 

All about the project

We would like to warn you, as a resident affected by this construction work, about occasional disruptions by giving you regular updates. You can read our calendar and our news updates to find out about upcoming work. 


  • 2017 – planning permission
  • November 2018 – start of construction work
  • December 2021 – start of operations

Engineering work updates.

We are currently carrying out the following work:


Between Renens station and the stop at Prilly-Malley in the middle of the railway area


We are currently building the flyover in three successive stages of work. The first stage will end in March 2020, meaning that the first 1,000 metres of construction will then have been completed.

From spring 2020, work will be devoted to the removal of 800 metres of protective wall and the construction of new tracks under and next to the structure. The last stage of the viaduct (175 metres) can then begin in November 2020. Most of the work will be carried out during the day in 2020 and 2021.


End of May to December 2020