This book explores the role of railways in developing sustainable low-carbon mobility by analyzing the intermodal relationship between railways and other transport modes. Focusing on geographical and governance perspectives, and taking China as a case study, it analyzes the competition and cooperation between and integration of railways and other transport modes, in order to provide guidance on future sustainable transport development. Firstly, the book examines the contribution of railways to low carbon emissions in China over recent decades by estimating the carbon dioxide emissions from various transport modes in China at national and regional levels using decomposition analysis. It then discusses the current competition and cooperation between railways and other transport modes, as well as their integration and the impact of their relationship on climate change. It also highlights how the competition between railways and other transport modes may change the passenger flows between city pairs and so alter transport carbon emissions and examines how cooperation and integration could improve passengers' travel experience while at the same time reducing carbon emissions. Lastly, it addresses the implications for future sustainable transport development based on institutional analysis. Presenting multidisciplinary, sustainable transport research on the role of railways in reducing carbon emissions, and also offering policy recommendations for developing low-carbon, integrated transport in the future, this book is a valuable reference resource for graduates, researchers, and government managers responsible for transport development, urban planning and environmental policy.