On-road emission factors of PM pollutants for light-duty vehicles (LDVs) based on urban street driving conditions

► An on-road PM sampling campaign was conducted on two major streets in Los Angeles. ► Emission factors for metals and trace elements were highest in PM10-2.5. ► Emission factors for organic species were highest in PM0.25. ► The on-road method captured higher PM levels from resuspension and abrasion than earlier roadway studies.