In this project the effects of parameters such as increasing height and distance from hard shoulder on Leq, LNP and dissatisfactory factor in sheykh Fazlollah Noori Freeway were investigated and a relation between these parameters was established.LNp was calculated through Leq, and dissatisfaction factor was defined according to local questioning. In this study the variation of traffic noise due to increasing height and distance from hard shoulder were measured in Sheykh Fazlollah Noori free way of Tehran.In this cross sectional study the residential zoos were recognized and the sound pressure levels were measured in different lights.The results showed that with increasing height the level of Leq is decreased, 3.48dB decrease in Leq per 3 meters rise in height. Then the isosonic curves for the whole route were drawn. On the other hand for every 15 meters in increasing distance from hard shoulderLeq decreases 1.5dB, there was no statistically significant relation between Leq, LNp, and dissatisfaction factor.