United States Department of Transportation
i
Phase I Report: Integrated Land Use, Transportation and Environmental Modeling
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2010-07-01
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[PDF-1.36 MB]
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Abstract:As of September 2009, the TRC Signature Project No. 1 is treated as two separate components under the Land Use and Transportation Modeling focus area: • The Integrated Modeling Project • The Environmental Metrics Project The Integrated Modeling Project seeks to implement several versions of an integrated land use/transportation model for Chittenden County, Vermont. Based on those results, the TRC project team hopes to evaluate the benefits of increased complexity and disaggregation in modeling of land use, travel demand, and travel supply (route choice and traffic assignment) relative to the costs. Working collaboratively with local and regional planners, the project also seeks to develop alternative policy scenarios that can be evaluated using these different model configurations. By evaluating the sensitivities of baseline and alternative policy scenarios to different configurations and complexity levels for the integrated model, the aim of the project is to gain insight about how the appropriateness of model disaggregation and complexity may also vary with policy application. Towards this end the project team will compare an integration of the dynamic UrbanSim land use model with a static traffic assignment (TransCAD) to a more complex integration of UrbanSim with a traffic simulation (TRANSIMS) and trip generation from TransCAD. For simplicity, from here on, the former integration will be referred to as the "2-way model" and the latter as the "3-way model". Finally, the Environmental Metrics Project seeks to develop tools for generating environmental indicators from the outputs of the integrated models, which will allow for evaluation of scenarios on the basis of environmental metrics.
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