On-road vehicle traffic is one of the largest sources of hazardous air pollutant emissions in the United States (U.S.), with a disproportionate impact on historically disadvantaged communities. Numerous studies have shown that these communities bear a higher burden of exposure to traffic-related air pollution (TRAP), which is typically highest near major roadways and declines to background levels within a few hundred meters of the road corridors . Proximity to high-traffic roads has been linked to increased risks of adverse health outcomes, including respiratory and cardiovascular diseases, as evidenced by numerous health effect studies . A recent systematic review and meta-analysis by the Health Effects Institute Panel (2022) underscored strong evidence linking TRAP exposure to all-cause mortality, circulatory mortality, heart disease in adults, and varying degrees of evidence for lung cancer mortality, asthma in adults, and respiratory infections in children . Racial, ethnic, and socioeconomic disparities in exposure to TRAP in the U.S. are well-documented and persist despite overall reductions in vehicle emissions levels , exacerbating public health challenges in underserved communities.