Road dust pollution of Cd, Cu, Ni, Pb and Zn along . The average concentration values of the metals Cd, Cu, Ni, Pb and Zn were found to be 5 ± 1, 52 ± 18, 23 ± 6, 104 ± 29 and 116 ± 35 mg kg- 1 respectively, which were generally lower than the values cited in literature.