This document describes how to create a comprehensive framework for evaluating the full impacts (benefits and costs) of a particular transit service. It identifies various categories of impacts and how to measure them. It discusses the travel impacts of various types of transit system changes and incentives. It describes ways to optimise transit benefits by increasing system efficiency, increasing ridership and creating more transit oriented land use patterns. It compares automobile and transit costs, and the advantages and disadvantages of bus and rail transit. 

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