Effect assessment of traffic parameters on equivalent sound pressure level (Leq) in the highways of Ahwaz city, Iran

Background and Objective:Noise pollution is one of the major environmental problems in cities which have been a growing concern in the last few years. One of the most important sources of noise pollution is transportation and cars traffic .present study was implemented in 2011 with an overall goal of effect assessment of traffic parameters on equivalent sound pressure level (Leq) in the highways of Ahwaz city, Iran. Method:For this study ,data was colletedfrom totally ll2measuring stations, 4 weekdays and 3 intervals as rush hours, yielding to a total number of 1344 traffic noise measurements (Leq) and the influential factors from traffic load and speed of vehicles. In the next step, all field data was put to Excel and SPSS, two soft ware’s for process. Then Regression multi— variables were tested on data in order to present some statistical models.The findings of this study showed that average of equivalent Sound pressure level in all stations is equal to 72/62 in 2/53 dBA.also ,The result of Pearson correlation test showed, there was a marked relation between equivalent Sound pressure level and all traffic parameters (P<0.0l). Conclusion According to the result of this study the equivalent Sound pressure level (Leq) can be effected by the traffic parameters. The models can be developed by defining variables such as: environmental and dimensional factors of roads ,wind speed and gradient effect , climate conditions ,estimation of absorption and reflection by construction materials, estimation of absorption by plant species, etc

کلیدواژه ها:

Noise pollution ، Traffic Variables ، statistical modeling ، Ahwaz