Research on the texture orientation characteristics of pavement surface

Pavement surface texture affects tire/pavement interaction related performances. More attention has been paid to texture depth and spectra. Texture orientation is one of important evaluation indexes affecting related performances. Whereas, it is hard to find related research. In this research, three characterization indexes, skewnees R_sk, the ratio of MPD to Root Mean Square (R_ms) and shape factor g were investigated. The Exposed Aggregate Cement Concrete (EACC) and Porous Asphalt (PA) pavement were acknowledged as positive and negative texture orientation, respectively. They were characterized by the three orientation evaluation indexes. The results were compared with the acknowledged cognition. The three indexes showed that EACC was positive. The R_sk and shape factor g showed that the PA texture was negative. This was consistent with the acknowledged cognition. Whereas, the ratio of MPD to Rms of PA texture showed opposite results. This means R_sk and g could be more widely used to characterize texture orientation.