An Update on Public Transportation's Impacts on Greenhouse Gas Emissions (2021) / Chapter Skim
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Pages 9-14
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From page 9... ...
9 Research Approach The modeling for this project focused on producing clear, welldocumented results related to the climate and sustainability impacts of transit, and in particular: • The national sustainability benefits associated with transit ridership, • The reduced carbon footprint of individuals using public transit, • Transit agency contributions to GHG emission reduction and sustainability, and • Public transit's national and regional impact on GHG emissions and energy use related to land use and travel behavior. The approach was to document the impacts of transit today based on existing data and research.
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10 An Update on Public Transportation's Impacts on Greenhouse Gas Emissions A transit agency calculating its greenhouse gas inventory will include energy use in offices, stations, and nontransit vehicles, but that is not typically a large source of its emissions impact relative to transit vehicle operations (Chester and Horvath 2007)
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Research Approach 11 • Hydrogen (gallon equivalents) , • Liquefied natural gas (gallon equivalents)
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12 An Update on Public Transportation's Impacts on Greenhouse Gas Emissions Land Use Efficiency: Calculating Avoided Emissions from Community Travel A significant body of research has shown that transit's impacts on emissions in a community expand beyond transit's passengers (Ewing et al.
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Research Approach 13 • Transportation Efficiency: VMT reduction of transit passengers (also called transit direct effect on VMT)
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14 An Update on Public Transportation's Impacts on Greenhouse Gas Emissions of transit service there were 2 miles of vehicle travel avoided. An adjustment for vehicle occupancy is not required because there is an occupancy factor in the model that is used to develop the transit multiplier.
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