ARIN has carried out complex projects and site management for underground and railways, in search of safe, robust and low-maintenance solutions, improving interoperability, so that travel times are reduced for both passengers and goods, obtaining savings, efficiencies and media synergies, betting on efficient logistics.

Work has been carried out on everything from railway freight terminals to passenger stations, and programmes to improve safety by eliminating level crossings and integrating them into the control system.

The implementation in works of the so-called third wire is noteworthy, given its technical complexity, whose track equipment and signalling elements are in a phase of continuous improvement, for the inclusion of the international gauge.