This is one of the most extensive railway projects ever carried out in Portugal, with intervention works involving an extension of 87 km of the Western line. Despite being one of the oldest rail lines in the country, dating from the nineteenth century, it has never undergone major intervention works and is therefore underutilized. The projected intervention works will provide a significant improvement of the service to the surrounding populations. The project, carried out by a consortium that includes Quadrante, has the objective of modernizing the line to allow rail traffic at a speed of 160 km/h. This includes the electrification of the whole section, in addition to doubling the line in a section of about 16 km. Quadrante was responsible for the projects for 14 road restorations, enlargement of 6 bridges and 2 new railway bridges, several retaining structures, restoration of 3 tunnels with a total length of 700m, expropriation processes as well as drainage and hydrology, containing more than 300 water crossings.