2008 study by the Transportation Research Record on correlation between fuel prices and the use of public transportation networks.
2011 Stanford and U.C. Berkeley study on global trends in transportation and how they may impact predictions about future carbon emissions levels.
2008 policy brief by the Rappaport Institute and Taubman Center on carbon dioxide emissions across metropolitan and suburban areas in the United States.
2010 study from the Transit Cooperative Research Program on recent streetcar systems and their impact on development and land-use patterns.
2010 report by the American Public Health Association examining the external costs that automotive-transportation systems impose.
2008 Brown University paper examining the extent to which highways could explain rates of suburbanization within the U.S.
2006 paper by the Brookings Institution exploring the potential for bias in the structure of metropolitan planning organizations.
2007 meta-analysis by Amsterdam University of U.S. and international studies on transit stations' effect on property values.
2009 University of Texas metastudy on the cost, operational characteristics, and land-use impacts of different mass-transit technologies.
2009 review by the World Bank of methods available for addressing transportation-sector emissions and congestion.