Researchers have identified the ideal speeds for cyclists and pedestrians to move in order to limit their inhalation of air pollution. Study author Dr. Alex Bigazzi notes, “The faster you move, the harder you breathe and the more pollution you could potentially inhale, but you also are exposed to traffic for a shorter period of time. This analysis shows where the sweet spot is.” The research team concludes that cyclists should ride between 7.5 to 12.4 miles per hour (12.07 to 19.95 km/h) on city roads and pedestrians should walk between 1.2 and 3.7 miles per hour (1.93 to 5.95 km/h).
International Journal of Sustainable Transportation, October 2016