2010 University of California, Los Angeles, study published in Transport Policy on the relationship between bicycle use and riders' immigrant status.
2010 report by the American Public Health Association examining the external costs that automotive-transportation systems impose.
2008 U.C. Berkeley study looking at the effect of carpool lanes on the number of person and vehicle hours traveled.
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.
2009 paper by the Pew Internet and American Life Project on the rate of cell phone use while driving among American teenagers.
2008 paper by the Widener University School of Law on approaches for realizing the potential benefits of energy efficiency in the United States.
2010 report by the National Resource Council on the cost of the production and use of various forms of energy in the United States.
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.