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This study was carried out to investigate the impact of traffic activities on As, Co, Pb,V, Zn, K, Cr, Ir and Pd heavy metals ion concentration of roadside soil of Madinah city, Saudi Arabia is investigated. Surface and 20 cm under surface soil samples from 12 different sites were collected and analyzed. The measured concentrations of the four heavy metal ions were correlated to the traffic density which was monitored in roads near the sampling sites. The results revealed significant dependence of Pb , Zn Cr, and Ir on traffic density with correlation coefficients of 0.991 ,0.987, 0.948 and 0.898, respectively. The other metals, As, Co ,V, K and Pd showed little dependence on traffic density and no dependence between the surface and under surface concentration was found. The values of pollution indices such as contamination factor (CF), degree of contamination (CD) and geo-accumulation index (Igeo) indicated various levels of contamination in the roadside soil.