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6 regions of the United States, with a particularly high number pleted by only one individual within the organization. Thus, of responses from transit agencies in Florida. Figure 1 maps respondents may have answered questions that are outside the location of survey respondents. Agencies are grouped their areas of expertise. The reader should keep in mind that by size, as determined by annual passenger miles traveled individual responses reflect the respondent's best under- (PMT) in 2007. A full list of respondents to the survey is standing of his or her agency's activities and policies. provided in Appendix B. Based on information gleaned from the survey and litera- ture review, three transit agencies were selected for follow-up interviews. Agencies were selected for interviews based on their willingness to participate, their depth of experience with reducing GHG emissions, and their implementation of unique strategy types. Interviews with staff of these agen- cies were conducted over the phone. The results of these interviews are reported as case studies. REPORT ORGANIZATION This synthesis report is organized into eight chapters. Fol- lowing this introduction, chapter two provides a primer on the phenomenon of climate change and transportation's role in climate change. Chapter three describes the basic ways FIGURE 1 Map of survey respondents, by agency size (annual passenger miles traveled) [Source : Annual passenger that transit reduces GHG emissions. Chapter four describes miles traveled (PMT) from National Transit Database (2007)]. in greater detail the specific strategies that transit agen- cies can implement to reduce GHG emissions. Chapter five explains techniques to estimate the impact of transit and The survey included questions about a wide range of transit strategies on GHG emissions. Chapter six discusses topics such as long-range planning, transit facilities, envi- relevant planning and policy issues for transit agencies. ronmental functions, vehicle technologies, construction and Chapter seven presents three case studies of transit agen- maintenance, modeling and analyses, internal and external cies that have experience in planning and implementing GHG policies, and staffing. While some respondents con- measures to reduce GHG emissions. Chapter eight provides sulted other staff within their agencies to arrive at the best conclusions and suggestions for further research. answers to individual questions, many surveys were com-