United States Department of Transportation
i
Cross-Modal Impact Assessment for Sustainable Transportation Networks
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2024-09-01
[PDF-1.02 MB]
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Edition:Final Report - September 2024 (March 2023–September 2024)
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Abstract:It is often difficult to compare different travel modes when it comes to assessing sustainability. That is because there are many factors guiding investment to different modes of transportation and these factors may not always be comparable from one mode to another. This study aims to develop a holistic impact measurement (HIM) methodology incorporating economic, environmental, and social factors of sustainability for different transportation modes. The focus of the project is to compare the overall sustainability of a travel choice from point A to point B with a current snapshot of Massachusetts transportation infrastructure. The second focus of the project is to convert these factors to monetary costs to better quantify the importance of agency costs and subsidies on transportation. The research includes stakeholder engagement, metric selection, and case studies across various transportation modes in Massachusetts. Key findings reveal that public transit and active transportation often emerge as more sustainable options, particularly for shorter trips. A sensitivity analysis demonstrates the influence of stakeholder priorities and policy changes on sustainability metrics. The study highlights the importance of increased public transit ridership, active travel promotion, and safety improvements.
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