 This study found that commuters using motorized transport had higher exposure to air pollution than did active commuters. The authors concluded that proximity to traffic and higher interchange increased the exposure to air pollution of commuters using motorized transport. Additionally, they noted that larger inhalation rates and commuting time increased inhaled dose among active commuters. This article was authored by Magda Sepida, Master of Science, Jossia Shofour, Ph.D., Roseanne Freak-Polly, Ph.D., and others.