In response to major national strategic priorities， including carbon peaking and carbon neutrality， building China into a transportation powerhouse， coordinated development of the Beijing-Tianjin-Hebei region， and the construction of a modern comprehensive transportation system in the capital region， a research team at Beijing Jiaotong University has continuously conducted studies on key issues related to urban transportation development in Beijing and regional transportation coordination in the Beijing-Tianjin-Hebei region. The team integrates multiple research approaches， including field investigations， transportation operation monitoring， policy evaluation， expert workshops， and transportation big-data analysis. The team focuses on issues such as the formation mechanisms of automobile dependency， optimization of public transportation operations， coordinated operation of suburban railways， and the development of regional commuting systems. Based on these studies， two major insights have been developed. First， transportation governance in megacities cannot rely solely on infrastructure expansion； greater emphasis should be placed on the coordinated advancement of demand‑side management， prioritized development of public transport and refined governance. Second， the key to integrated transportation development in the Beijing-Tianjin-Hebei region lies in strengthening coordinated rail transit operations， improving suburban railway and regional commuting systems， and leveraging high-quality development of high-speed railway to support regional coordination and the building of a country into a transportation powerhouse.