Use of EF analysis, PCA and HCA eliminating their deficiencies is presented.
Na, Cu, Cd, Zn, Sn, K, Ca, Sb, Ba, Ti, Ni and Mo are generated by non-soil sources.
Soil and asphalt wear is a mixed source. Tyre and brake wear are other sources.
Sea salts is also one a prominent sources of metals in road deposited dust.