The project goal is to monitor and assess air quality conditions and their effects at one of the downtown urban international crossings, Bridge of the Americas (BOTA), in the Paso del Norte airshed, using personal and low-cost sensors that will measure particulate matter (PM2.5) emissions. This project will address both indoor air quality pollution in BOTA workplace installations, and outdoor air quality pollution sources, when monitoring emissions of the idling vehicular traffic on the bridge. Data produced by the monitors and observations made by the projects team at the international crossing will be used to develop a Health Risk, Sociological, and Transportation assessments. Data findings of the project will help identify viable and cost-effective options for reducing vehicle emissions with the hopes that these measures are considered for implementation by the regulatory agencies in the future.