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18 Conclusions The needs of MPOs and DOTs may differ when they address the uncertainties posed by future CAV deployment and use. For instance, an MPO or DOT in a high-growth area, with signifi- cant congestion and investment needs, may adopt an aggressive approach to scenario planning and specifically wish to include AV, CV, and other high-impact technological developments in the long-range plan for the region. Another MPO or DOT may not have growth issues, so the focus of the long-range plan may instead be on economic development and quality-of-life improvements for citizens. In such a region, the impacts of AVs and CVs could be addressed in an incremental fashion by using only data-supported modeling rather than scenario-based methods. The planning approach that might be chosen has an impact on the type of modeling that is appropriate. An MPO or DOT may decide, as a matter of planning policy, to adopt a range of strategies that best fits the long-range requirements a region is addressing. While the approach to development of methods may differ between regions and states, all agencies have in common the need to develop new planning and modeling processes that include CAVs in the transportation environment.
Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACIâNA Airports Council InternationalâNorth America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing Americaâs Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) TCRP Transit Cooperative Research Program TDC Transit Development Corporation TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board TSA Transportation Security Administration U.S.DOT United States Department of Transportation
