This book offers new insights into the wider socioeconomic impacts of high-speed rail (HSR). Over the past few decades, significant investments have been made in these systems around the world. The use of public funds for the construction of HSR offers a range of benefits, such as time savings, increased comfort, and reduced traffic congestion, as well as broader economic benefits, including the advancement of less developed regions.These proceedings feature papers presented at the 4th International Workshop on the Socio-economic Impacts of High-Speed Rail. The focus is on impacts on the land-use system, competition vs. integration with alternative transport modes, investment, and evaluation. The book provides an overview of the current state of practice from both theoretical and empirical perspectives. As such, it is of interest to academics in transport economics and related fields, as well as professionals in the transport industry.