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SECTION 1 Guidebook Organization and Purpose The primary sections of the Guidebook are as follows: Section 1 presents the Guidebook's organization, background, purpose, and overview. Section 2 discusses the reasons why statewide corridor planning (SWCP) is an approach that has proven useful to transportation planners, presents the rationale and reasoning for using an SWCP approach toward transportation planning, offers a framework for conducting SWCP as an organizing concept for the development of technical guidance. Section 3 provides technical guidance on the activities and actions that transportation planners can follow to develop an SWCP approach to statewide transportation planning. Section 4 applies this guidance in a hypothetical state to illustrate the substance and process of conducting SWCP. Section 5 presents a list of useful references for practitioners. The following information is included in the appendices: Appendix A presents examples from state DOTs that describe how individual states have implemented key steps of the SWCP process. Appendix B and Appendix C present more detailed guidance on the levels of corridor analysis and analytical tools that can be used in the SWCP process. Appendices D, E, and F present additional guidance on pubic transit, freight transportation, and economic development, respectively. These three topics were identified as challenges by state DOTs through the surveys and case studies undertaken during the research project, as well as input received during the review of the Guidebook. Background Transportation planning provides important information to those making decisions on improving transportation system performance. Before the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 made statewide, long-range multimodal transportation planning a federal requirement, statewide transportation planning was undertaken by many states for a variety of reasons. Some of the early statewide planning efforts were aimed at producing a list of projects that best met the transportation needs of the state. Other efforts were required by state law, with many of these focusing not only on transportation needs, but also on the expected impacts on the environment, economic development, tourism and the myriad other issues that are influenced by transportation system performance. Still others could be best described as policy statements that established overall direction for transportation investment, but did not identify specific projects. Just as there are many reasons for undertaking a transportation planning process today, including a federally legislated mandate, so too are there many different ways of producing the 4