2010 paper by the World Bank on the potential societal consequences of increased biofuels production to meet current national targets.
2010 meta-study in the American Journal of Public Health on the broader consequences of raising alcohol prices.
2011 study for the Transportation Research Board on link between fuel prices and alcohol-related car accidents.
2009 report by the National Highway Traffic Safety Administration on accidents involving hybrid cars and other forms of travel.
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 metastudy by researchers from the University of Queensland on the findings from 35 different studies of speed cameras.
2009 study commissioned by the New York City Department of Transportation analyzing trends and causes of pedestrian-related car crashes.
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.