This study explores the implementation and challenges of Building Information Modeling (BIM) in infrastructure projects within the Swedish Transport Administration (STA). Through a combination of a literature review and semi-structured interviews with ten STA project managers, the research identifies both the benefits and obstacles associated with BIM use. The findings demonstrate that BIM significantly enhances project coordination, improves design quality, supports visualization, and facilitates better planning and decision-making particularly in complex infrastructure projects. Despite these clear advantages, BIM adoption remains inconsistent across STA projects. The results show several key barriers lack of technical knowledge, unclear internal guidelines, resistance to change, and the perception that BIM tools are too complex. Even experienced BIM users expressed uncertainty about how to apply the technology strategically. Rogers’ Diffusion of Innovations theory, shows that study BIM is perceived to offer relative advantages, low compatibility with existing workflows, high perceived complexity, and limited trialability and observability hinder its widespread adoption. To overcome these challenges, the study recommends a systemic approach that includes clearer BIM objectives, targeted training for project managers, simplification of tools, and the sharing of successful case studies. These actions are aligned with Rogers innovation attributes and are essential to realizing BIMs potential within STA. Ultimately, the findings suggest that BIMs technical value is recognized but without strong organizational support and strategic alignment, its broader adoption remains limited.