Equity and inclusion are important issues for a sustainable society, so we should promote transport infrastructures that are equitable and inclusive. The socioeconomic impacts of high-speed rail (HSR) systems are important considerations for policymakers when planning new lines, assessing their feasibility, and identifying financing sources for sustainable mobility. However, little attention is paid to their effects on equity, outside of studies of facility and service access and economics. A greater focus on HSR and equity issues by governments could help to advance solutions that reduce the negative effects of new projects in favor of more inclusive development. This SI provides some contributions featuring qualitative and quantitative analyses, case studies, and policy insights on the impacts of HSR on equity.