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. With the multiplicity of his activities, TSO actively participates in the improvement of the modern railway technologies: introduction of concrete sleepers, rail welding, elastic fastenings, continuous welded track, ballast less track and high speed lines. 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.