“…In addition, transport microenvironment depends on other variables, such as sex, race, age, body mass index (BMI), lifestyle, usage of a face mask during the trip, history of respiratory diseases, smoking habits, condition of the highway and presence of green spaces [21]. Moreover, some authors have underscored the role of individual perception, travel attitudes and travel behavior as determinants of the transport microenvironment [22]. Therefore, qualitative studies could introduce additional elements for exposure analysis.…”