Urban transit systems (UTS) play a critical role in ensuring the efficient movement of people in modern cities, although they face increasing threats from rapid urbanization, climate change, and unexpected disruptions. To tackle these challenges, this book presents a comprehensive framework that integrates system vulnerability modeling, multi-hazard vulnerability evaluation, and resilience-oriented planning and operations. By bridging theoretical modeling with practical applications, the book provides valuable insights and decision support for researchers, planners, and operators seeking to build robust and adaptive transit systems. To conclude, through its three main parts and the specific methods and analyses presented in each part, this book demonstrates its value and contributions in the following key aspects.