The expert contributors explore how decisions are made at different stages in mega-projects and the multi-actor relationships between public and private partners. They evaluate the perspectives and pitfalls in determining the costs and benefits of a mega-project ex ante, and examine the wider impacts of mega-projects, including issues such as regional growth, energy transition and climate change. Although the focus is on the advanced economies of North America, Europe, and Australia, much of the material is useful for other parts of the world where large transport infrastructure projects are currently underway or will be developed in the coming years. Providing crucial background information for those who want to understand decision-making processes on large transport infrastructure projects, this fascinating Handbook will prove an important source of information for academics, researchers and students in the fields of transport, infrastructure, project management, management science, economic analysis (cost-benefit analysis), public policy, environmental policy and ethics. Practitioners, politicians and policymakers involved in large transport infrastructure projects will also find this book to be an invaluable reference tool. -- Publisher description.