2014 study by the U.N. Intergovernmental Panel on Climate Change on ways that nations, states, regions and municipalities can act to limit or reverse harmful trends in greenhouse-gas emissions.
2012 roundup of recent research on issues related to the major commuting modes in the United States, including cars, public transit, bicycles, and walking.
2012 paper by the Federal Reserve Bank of San Francisco for the National Bureau of Economic Research on the economic effects of spending on highway projects.
2011 study from the University of Toronto and London School of Economics on the relationship between infrastructure and automotive traffic levels.
2011 study in Psychological Science on the connection between progressive taxation and the happiness of citizens around the world.
2011 report by the Brookings Institute’s Metropolitan Policy Program on the transit options of U.S. households without private vehicles.
2011 study by the Brookings Institution on how well U.S. public-transportation networks line up with the needs of workers and commuters.
2011 report by the U.S. Environmental Protection Agency on how building location factors into the total cost of household energy use.
2008 study by the Transportation Research Record on correlation between fuel prices and the use of public transportation networks.