The specialist for tracks and overhead lines works

Your partner for railway solutions

With more than 85 years of experience in France and overseas, TSO provides its high knowledge for construction, renewal and maintenance of railway tracks, modernization and electrification of overhead catenary’s system, surveying works as well as software development dedicated to railway, maintenance and overhauling of locomotives and wagons.


TSO, travaux sur voies ferroviaires à haute technicité


Since several decades, this know-how granted TSO to be the actor of highly technical projects and to install the tracks in which took place the World Speed Records:

320 mph (515,3 km/h) on the « Atlantic » high speed line in 1990

356 mph (574,8 km/h) on the « East-European » high speed line in 2007


TSO, travaux sur voies ferroviaires à haute technicité

Worldwide presence

With the multiplicity of his activities in France and all over the world, TSO actively participates in the improvement of the modern railway technologies: introduction of concrete sleepers, rail welding, elastic fastenings, continuous welded track, ballastless track and high speed lines…


Map of the international presence

Highly technical expertise

Focused on technical innovation, TSO gives priority to quality, efficiency and safety improvements.
TSO constantly invests in equipment and machineries specialized in construction, renewal and maintenance of railways.
The company owns equipment and machineries with high standards giving TSO an advanced technical expertise and strong competitiveness in order to comply with all new markets requirements.


TSO, travaux sur voies ferroviaires à haute technicité

TSO details

> Created in 1927


> Over 1.600 employees in France and over 1.500 employees abroad


> More than 260 million euros of turnover


TSO with NGE

The organization by specific trade in NGE is the warranty of culture and expertize conservation for each trade, while allowing synergies development.

TSO and NGE have successfully developed in their respective trades. This is due to the following values common to TSO and NGE: respect, ambition, know-how, autonomy.




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