This project will focus on the use of personal air monitoring equipment in areas of high vehicle flow to determine how air pollutants (PM10, PM2.5, carbon monoxide and black carbon) impact public health. The project team will determine the concentrations of air pollutants that residents of Piedras Negras and Ciudad Acuña, Coahuila are exposed to in high vehicular traffic corridors and where pedestrian walkways are located. The walkways where the lowest concentrations of pollutants are found will be proposed as avenues for reducing exposure to poor air quality among pedestrians. Alternatively, areas identified to have the highest pollutant concentrations will be priority areas to address air quality concerns. The project team will host a workshop in each city to inform residents of the project findings and educate them on the effects of poor air quality and public health.