Proximity to traffic and exposure to polycyclic aromatic hydrocarbons in relation to Attention Deficit Hyperactivity Disorder and conduct disorder in U.S. children

•Prenatal exposure to traffic-related air pollution associated with neurobehavioral disorders.•Linked 2 databases to see if living near major road was associated with ADHD in children 8-15-years.•The study used U.S. nationally represented datasets with C-DISC based diagnoses.•The relation between proximity to a major road and ADHD and conduct disorder was not statistically significant.•No associations were found between proximity to a major road and urinary PAH metabolites.