Airborne particulate matter was collected at the intersection of Industrial Road in Kawasaki-city, Kanagawa, Japan using a
12-stage low-pressure impactor. High concentrations of airborne particulate matter have been observed in this area. The collected
samples were analyzed for 34 elements by instrumental neutron activation analysis (INAA), and data on the elemental concentrations
were obtained. High concentrations of fine particles of As, Br, Sb, V, and Zn were observed. It was further observed that
these fine particles were originated predominantly from the wear of tires and brakes, and not from automobile exhaust emissions.