If we built cities differently, would people travel differently? Marlon Boarnet, professor of planning, policy, and design and economics from the University of California, Irvine set out to the answer that very question. Through his research, Boarnet works to address the social issues that surround transportation and land use.

A study by Montreal University found that children living in economically disadvantaged urban areas are the most likely to choose walking and cycling. Photo by Nicola Jones.

Study finds that 45 percent of Americans would support a gas tax if its revenue contributed to global warming reduction efforts. Photo by Steve Rhodes.

A new report on China's rapid motorization highlights the importance of developing sound policies to address congestion and air pollution. Photo by Remko Tanis