By M. Stroup-Gardiner
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The analyses were performed on the %DL measured with the RSEs and that resulted from the simulation analysis as well as on the IRI measured using the automated profiles. In all cases, it was assumed that the %DL and IRI data are normally distributed. 24 m] segments), while other analyses were performed on the overall section measurement (each section is represented as one unit). The following section summarizes the performed statistical analyses. In each case, the purpose of the analysis, the hypothesis, the type of measurement (detailed or summary), the statistical test and the cases analyzed are presented.
The IRI values of the test sections are presented in Table 3. It should be noted that IRI measurements of the ICC Lightweight Profiler were not available. 48 CONSTRUCTINGSMOOTH HOT MIX ASPHALT Table 3 - IRI results (m/km). 971 StatistiealAnalysis Several statistical analyses were performed to investigate the equipment repeatability and the differences among devices, including the two RSEs. In these analyses, the F-Test and the Student T-Test were used . The confidence level was always selected to be 90%.
2) The amount of benefit to the Department and to the Citizens of Arizona gained from having the smoothness specification versus its cost is significant. The cost/benefit ratio is about 4. (3) The smoothness of old pavements does not have a significant effect on the smoothness of projects that have AC layers involved while it has some effect on the smoothness of the ACFC/ARACFC projects completed by some contractors. 16 km follows Lognormal distribution. (5) There is a significant difference in smoothness variability among projects, contractors, and categories.
Constructing Smooth Hot Mix Asphalt (HMA) Pavements by M. Stroup-Gardiner