Sustainable Mass Transit: Challenges and Opportunities in Urban Public Transportation examines the numerous types of mass transit systems, looking closely at all their key functions, including operations, maintenance, development, design, building and retrofitting. It examines the mitigation measures that reduce or eliminate negative environmental impacts, including green infrastructure, materials conservation, ecological conservation and other sustainable initiatives. The book explores organizational best practices, environmental regulatory constraints and life-cycle assessments, describing which sustainable elements can be added while rehabilitating or expanding a mass transportation infrastructure or ancillary facility. The book concludes with a look at forthcoming sustainable initiatives that will enhance mass transit systems.