Traffic and Climate Impacts on Rutting and Thermal Cracking in Flexible and Composite Pavements

The study presented in this paper analyzed four long-term pavement performance (LTPP) test sections located the states of New York (NY) and California (CA). Two them are flexible sections, whereas other two composite sections. levels analysis—in-state analysis cross-state analysis—were performed for these to determine impacts traffic climate conditions. was evaluated respect thermal cracking rutting resistance. in-state focused on comparing same state. CA exhibited insignificant variation cracking, although one had an additional 1.5” (38 mm) dense-graded asphaltic concrete (AC) layer. On hand, AC layer resulted a significant reduction depth section. NY revealed that 0.8” (20.4 chip seal significantly low resistance rutting. examined comparable structural capacities—two with capacity, high capacity. comparison capacity depth, i.e., under loads freezing climate. contrary, showed relatively both warmer climates. Furthermore, presents deterioration models LTPP These were developed using multiple linear regression considering service life (age), load (average annual daily truck traffic, AADTT), impact (freezing index, FI). coefficients determination (r2) range 0.82–0.99 standard errors varying from 0.01 9.92, which indicate reliable.