In a regulatory landscape increasingly oriented toward social responsibility, Circular has emerged as a pioneer in the assessment of social impacts across the product life cycle (S-LCA). It offers an innovative approach through the development of the first Social Product Declaration – SPD, in collaboration with Hitachi Rail, conducted for Trenitalia’s Blues hybrid train. The first Product Category Rules (SPD-PCR) were developed for assessing the social impacts of a train carriage, in alignment with the guidelines established by the UNEP 2020 framework for S-LCA and the ISO 14075 standard (2024).