The project involves reusing existing fiber optic infrastructure with minimal intervention at the ends to install a distributed thermal sensor (DTS). This sensor measures temperature and its variations with an accuracy of less than 10 meters and 1 degree Celsius, and a range of up to 60 kilometers, enabling the creation of a thermal map. While this technology has been used for a decade in other sectors, Indra is a pioneer in its application to the railway sector, as well as to highways and roads.