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Assessing and Comparing Environmental Performance of Major Transit Investments

Transit Cooperative Research Program (TCRP) Project H-41 addresses the need for new measures of the environmental benefits of transit investments. The objective of this research is to present, evaluate, and demonstrate criteria, metrics, and methods for assessing and comparing the environmental performance of major transit investments. The research was undertaken to offer decision makers optional criteria, metrics, and methods for assessing transit projects with regard to environmental performance. The first phase of research included a literature review, interviews with stakeholders, a review of four recent transit project alternatives analysis documents or environmental impact statements, an enumeration of potential metrics, and development of a more detailed approach to screening and selecting metrics. In the second phase of research the selected metrics were tested on six pilot projects.