The warming of the Earth’s temperature due to human activities, known as anthropogenic climate change, is a threat to the environment and human health. The transportation sector is a major contributor to anthropogenic climate change, being responsible for 27 percent of all domestic greenhouse gas (GHG) emissions in 2003. Within this sector, urban surface travel has been the major focus of researchers and policymakers. To broaden this focus to include interregional travel, the proposed research focuses on the aviation sector. Airport access modes are shown to be a large proportion of aviation system GHG emissions; due to their share and political and engineering realities they are targeted for aviation system GHG reduction. Discrete choice models are used to study the entry of clean airport access modes into the market, and it is found that the entry of a subsidized electric vehicle doorâ€toâ€door van could reduce GHG emissions by 36 percent.
