United States Department of Transportation
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Consistent VMT Mapping and Modeling in California: How Can We Better Assess the VMT Impacts of State and Local Transportation Projects? [Brief]
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2024-12-01
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[PDF-306.58 KB]
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Corporate Contributors:United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration
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Edition:Research Brief
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Abstract:Despite California’s ambitious target to achieve carbon neutrality by 2045, the state is not reducing greenhouse gas (GHG) emissions from personal vehicle travel, and per capita Vehicle Miles Traveled (VMT) and GHG emissions continue to increase. One central challenge of climate planning facing California is the lack of consistent methods to measure the VMT impacts of transportation projects. Using both qualitative and quantitative data, this research answers the question: “What are the advantages and limitations of existing VMT calculators to determine the climate impacts of transportation projects to help meet California’s climate goals?” Research methods included: (1) a quantitative analysis of the existing VMT tools in practice, particularly in California, by identifying and analyzing the attributes of each tool and clustering the tools into distinct methods based on their similarities in principles, inputs, and outputs; and (2) a qualitative analysis of perspectives of transportation professionals regarding VMT as a metric and VMT tools. F
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