Evaluation of a Newly Constructed Freeway Asphalt Pavement Surface Unevenness Case Study

It is not rare for newly constructed asphalt pavement to have an uneven surface; consequently, conducting regularity tests of asphalt pavement surface evaluates rider comfort and a level of construction. The irregularity of the asphalt pavement surface generates vibration and noise in vehicles, confuses drivers, and limits speed and maneuverability; also, the highway does not complete its operational duty, which requires early maintenance work. Hence, many transportation officials worldwide view having a smooth pavement as essential. Meeting the standards for surface regularity is crucial to constructing an asphalt road with a smooth surface. It is not rare for newly constructed asphalt pavement to have an uneven surface; consequently, conducting regularity tests of asphalt pavement surface evaluates rider comfort and a level of construction. The irregularity of the asphalt pavement surface generates vibration and noise in vehicles, confuses drivers, and limits speed and maneuverability; also, the highway does not complete its operational duty, which requires early maintenance work. Hence, many transportation officials worldwide view having a smooth pavement as essential. Meeting the standards for surface regularity is crucial to constructing an asphalt road with a smooth surface. This study included irregularities tests before and two years after traffic opened and investigated longitudinal surface variations in the newly laid asphalt pavement. It found a difference in the longitudinal road surface irregularity that was not statistically significant, and the densification of the pavement layer is the cause of this difference due to traffic load.