a Beijing Jiaotong University, State Key Laboratory of Rail Traffic Control and Safety, Beijing 100044, China
b Chinese Academy of Engineering, Beijing 100088, China
c Key Laboratory of Railway Industry of Proactive Safety and Risk Control
d Beijing Subway Operation Technology Centre, Beijing 100044, China
e CRRC Academy Co., Ltd., Beijing 100070, China
f Shijiazhuang Tiedao University, School of Safety Engineering and Emergency Management, Shijiazhuang 050043, China
g China Academy of Railway Sciences, Beijing 100081, China
Safety is essential when building a strong transportation system. As a key development direction in the global railway system, the intelligent railway has safety at its core, making safety a top priority while pursuing the goals of efficiency, convenience, economy, and environmental friendliness. This paper describes the state of the art and proposes a system architecture for intelligent railway systems. It also focuses on the development of railway safety technology at home and abroad, and proposes the active safety method and technology system based on advanced theoretical methods such as the in-depth integration of cyber-physical systems (CPS), data-driven models, and intelligent computing. Finally, several typical applications are demonstrated to verify the advancement and feasibility of active safety technology in intelligent railway systems.