In December 2013 cross-industry Platform Train Interface Strategy Group (PTI SG) was set up, responsible for the creation of a national PTI Strategy. The strategy was published in January 2015. To develop the strategy a risk-based approach was adopted which triangulated methodologies (workshops, quantitative and qualitative analysis, literature review and external research), combining the disciplines of Human Factors, Operations, Engineering, and Data Analysis. This paper is focused on the role Human Factors played in the development of the strategy.