Alstom and the Swiss Federal Railways (SBB) are preparing a major change to their fleet of FV-Dosto double-decker trains. The companies have begun extensive testing of a modified FV-Dosto train without a tilting system (WAKO suspension). The first phase of the trials is taking place in Velim, Czech Republic, and will continue in Switzerland if successful.
Purpose: More Reliable, Economical and Comfortable Train Operation
The main purpose of these tests was to determine whether FV-Dosto trains could provide a reliable, stable and comfortable ride without the tilt mechanism. Originally produced by Bombardier (now part of Alstom), FV-Dosto trains featured WAKO suspension, which allowed for higher speeds on curves. However, this system failed to demonstrate the expected reliability in service.
Although SBB stopped using the WAKO system in 2022, its components remain installed in trains. This increases maintenance costs and negatively impacts passenger comfort. The new project launched by Alstom and SBB aims to switch to simplified bogies without a tilt mechanism. This change is expected to significantly improve the stability of the trains, reduce lifecycle costs and simplify overall train operation.
Comprehensive Renewal Program Begins in 2026
According to SBB’s plans, the renewal process of the FV-Dosto trains will begin at the end of 2026, during routine maintenance and overhauls. The comprehensive upgrade programme is expected to be completed in early 2030 and will affect all 62 FV-Dosto units in the SBB fleet.
SBB says the cost of this important project is around several tens of millions of Swiss francs (euros). Although no exact figure has been disclosed, it is expected that this investment will pay for itself in the long term through reduced maintenance costs.
Alstom and SBB Give Swiss Railways a Modern Touch
This joint work between Alstom and SBB represents an important step in the modernization of Switzerland’s rail infrastructure. If the transition to a slopeless system is successful, it will continue to increase the attractiveness of rail transport by providing passengers with a more reliable, stable and comfortable service. With this project, Alstom continues to play a key role in the development of Switzerland’s rail infrastructure.
