In Ethiopia; rules and regulations on highway traffic signs speculate different restrictions (like loadrnlimit posts) but still one of the existing problem affecting pavements design period is from the effectrnof the heavily loaded freight transportation that uses pavements / roads for circulating goods that itrntransports. Overloading also contributes for the aggravation of the pavement deterioration problemrnthat is seen within the country. Therefore, this paper tries to show the influence of overloading byrnanalyzing which percentage of overloading contributes much for the influence plus how thernpavement fatigue life gets reduced is also discussed.rnAnalysis includes the application of the famous theories â€œfourth power lawâ€ as well as â€œAASHTOrnremaining fatigue life analysisâ€ were the results gave good figure of the negative influence ofrnoverloading. The investigation was done by assessing primary and secondary data collected at Awashrnsize and weight control station (were awash station is chosen from assessment based on the mostrnheavily loaded vehicle count from the secondary data collected for different control stations inrnEthiopia).rnIn conclusion, about 48% of the examined axles were overloaded and among these 56% of the axlesrnwere on the margins from the specified legal load (i.e. in between 10.1 â€“ 12ton) were tolerance ofrnthese loads was also observed at the control station. An overlay thickness was also estimated to showrnthat the considered pavement after some years of service will require unexpected maintenance inrnorder to carry the additional loads due to overloading. Therefore from the results of the analysis, it isrnseen that the effect of overloading on the life of pavements as well as on rehabilitation expenses willrnbe severe and needs strict awareness so that road defects / distresses due to overloading will bernminimized.