A new study published in Preventive Medicine by three economists from the University of East Anglia and the Centre for Diet and Activity Research (CEDAR) looked at the psychological effects of commuting on nearly 18,000 British commuters between the ages of 18-65-year-old, in 18 waves of surveys between 1991 and 2009. The study focused on commuters who switched from car commuting to alternative commuting, including active travel (i.e. walking or cycling).