The aim of this study was to assess pavement performance that by measuring tire-pavement noise with onboard sound intensity method by use single probe, at different constant speed. Different site locations have been selected in Baghdad city. Onboard sound intensity had been used with the separate probe, RS-232 Sound level meter model: SL-4013 and measure the noise that produces as a result of interaction between tire and pavement. All tires new and in good condition that meet the requirement Tire Criteria By using the single probe and fixed it on the right rear tire according to specification AASHTOO TP76.The test sections (AL-Rubaaee Street, Muhammad –AL-Kassim parallel to the technology university, 14 July Street, AL-Fu rat Freeway Street) at a different distance so that we can evaluate the street and assess the condition of the pavement section. Testing AL-Mahmodia for free highway with heavy vehicle (Mercedes Benz tire type 315/80R22.5) and passenger car (SOUL tire 235/45R18) to show the effect the difference in loads on tire/pavement Noise. And reflect that on distress and road roughness. Regression analysis was applied to determine the effect of pavement distress on noise levels in Baghdad city. Multiple regression analysis on all sections shows that overall sound intensity Increases with pavement age and with the presence of raveling, rutting damage, cracking and patching R² from the Model Summary is equal to 0.897 the high value of R² seen as proof of a good fit and variables have a statistically significant role to play in the model.