Sustainable Mass Transit: Challenges and Opportunities in Urban Public Transportation, Second Edition highlights the many sustainability solutions and alternatives to fossil fuel usage including renewable energy and efficiency in mass transit, as well as the conservation of materials, water, and air and the overall health of communities. This new edition will update the reader on developments in the field since 2017 and advancements in sustainability solutions. It explores how Environmental Management System frameworks improve environmental performance in the operations, maintenance, design, rehabilitation, and expansion of a mass transportation system. The book covers the numerous types of mass transit systems, looking closely at all their key functions, including operations, maintenance, development, design, building, and retrofitting. It explores the mitigation measures that reduce or eliminate negative environmental impacts, including green infrastructure, materials conservation, ecological conservation, and more. It covers energy, greenhouse gas emissions, toxic pollution and other significant environmental impacts, recycling, and more. It also examines organizational best practices and 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.