Recent research has focused on the contributions of medium-and heavy-duty truck traffic, which emit significantly higher levels of particulate matter (PM) and nitrogen oxides (NOX) than lightduty vehicles . These diesel-powered vehicles are a major source of TRAP emissions, even though they make up a smaller proportion of the U.S. vehicle fleet by distance traveled. Despite their smaller numbers, medium-and heavy-duty trucks are responsible for a disproportionate amount of pollution, which contributes to exposure disparities among racial, ethnic, and socioeconomically disadvantaged groups . The elevated emissions from these vehicles, particularly in urban and freight corridor environments, heighten the urgency of addressing the differential exposure levels faced by underserved communities.