The Ministry of Infrastructure and Water Management, responsible for major infrastructure projects in the Netherlands, is exploring methods to incorporate well-being in its project evaluations and designs. To address the limitations of expressing well-being in monetary terms, a new evaluation method called Participatory Value Evaluation (PVE) has been developed. PVE engages citizens in policy decisions, mapping their values and concerns, and providing a more inclusive approach to decision-making. This research focuses on investigating the added value of the PVE when applied to national infrastructure projects, with a case study of the Lelylijn project, a proposed railway line connecting regions in the Netherlands. The research addresses three key areas: where the PVE can be applied in the project process and its perceived added value in the research phase, how policymakers experience the PVE, and how participants perceive their involvement in the PVE. Through interviews with policymakers and analysis of PVE responses, the study found that the PVE has the potential to incorporate public values into decision-making, enhance the quality of decisions, and promote accessibility and inclusivity. Policymakers perceive the PVE as valuable in understanding public opinion comprehensively and improving decision-making. Participants appreciate the PVE's accessibility and educational aspect but suggest improvements in question design and representation of diverse groups. In conclusion, this research highlights the potential benefits of using the PVE in national infrastructure projects, providing valuable insights into its impact on decision-making and public involvement. The study contributes to the growing emphasis on well-being in policy decisions and offers important considerations for the effective implementation of the PVE in future projects.