国际运输论坛ITF：2020在成本效益分析中比较公路和铁路投资（英文版）

Cost-benefit analysis has long been established as a means of informing decision makers about the expected impacts of transport projects and policies. It provides a means of assessing the case for an investment proposal in circumstances in which conventional market forces are either lacking or fail to operate efficiently. In place of decisions based on commercial criteria and expectations of profit, cost-benefit analysis informs decision makers about a broader metric in terms of the socia