The Transportation Research Board Committee on Statewide Multimodal Transportation Planning (ADA10) and the Federal Highway Administration sponsored a national Statewide Travel Demand Modeling Peer Exchange in Longboat Key, Florida, September 23-24, 2004. The states represented in the peer exchange had a wide range of experiences with statewide travel demand models (TDMs)—some had never considered a model, some were debating the development of a model, some had attempted to develop a model with limited success, and others were actively using a model in many aspects of state planning and operation. The participants discussed their statewide models (if they had one), the purpose and use of models in their state, problems and limitations of the model, and plans for future improvements. This document was assembled from responses submitted by the various participants. Most of the responses were received from state departments of transportation and this document focuses on a presentation and comparison of the modeling efforts in these various states. This comparison is not meant to be all inclusive as a number of states with important statewide modeling efforts are not included either due to their own inability to participate or the constraint on the number of participants. The report is organized as follows. Section 1 is this introduction. Section 2 summarizes the participants' responses regarding the status of their statewide modeling efforts. The states are listed alphabetically and each follows a standard format beginning with a general description followed by information related to seven topic areas: 1. Data requirements 2. Maintenance/use 3. Implementation 4. Scale/level of detail 5. Statewide/urban model integration 6. Freight/commercial vehicle modeling 7. Long-distance/recreational/tourism travel Section 3 provides a tabular comparison of various specific features of the statewide models. This comparison was mainly drawn from a set of specific questions that was included with the list of major topic areas above. The responses to those questions are contained in Appendix B. In many cases those responses had to be interpreted or combined with information provided elsewhere to adequately complete the tabulation. Section 4 contains a summary of the discussion held during the Statewide Model Peer Exchange. Each participant made a brief presentation to further describe the status of statewide modeling and responded to questions from other participants. Section 5 provides a discussion on the ranking of future research efforts and includes four statements on the four highest ranked research needs identified by the participants. Finally the report contains two appendices. Appendix A is the agenda for the peer exchange and Appendix B is the detailed questionnaire responses as previously discussed.
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