2025 Volume 23 Issue 4 Pages 493-
With the promotion of compact cities, the utilization of environmentally friendly railway transportation has become increasingly important. However, studies on the relationship between urban population agglomeration and railway networks remain insufficient. This study aims to analyze population agglomeration trends and their integration with railway network development. By incorporating the travel time reduction effect of railway networks into Moran's I index, we measured urban agglomeration in global and Japanese metropolitan areas. Additionally, we calculated the integration and reduction indices to assess the relationship between urban structure and railway networks, classifying cities based on these indicators. The results indicate that population decentralization is progressing in many cities and that the development of railway networks has a significant impact on population agglomeration.
