• skid resistance properties of SMA 11 S and a low-noise variant SMA 8 NH • skid resistance properties at sections of different ages and with different traffic volume • relationship between skid resistance properties, macrotexture and microtexture • macrotexture expressed by other parameters apart from the traditional MPD The paper presents in more detail the development of the skid resistant properties of two asphalt pavement wearing courses, namely SMA 11 S and SMA 8 NH, and their relationships to selected parameters of pavement surface macrotexture and microtexture. It presents the results of measurements performed in the Czech Republic with the use of a device TRT (skid resistance properties expressed by the F p parameter), a pendulum (microtexture expressed by parameters PTV), and a portable frame with a laser sensor (macrotexture expressed by MPD and other parameters). This paper evaluates the development of the friction coefficient over time at road sections of different ages and with different traffic volume, the effect of parameters of the used coarse aggregates (PSV), and relationships between the measured skid resistance properties, microtexture, and macrotexture for the above mentioned two types of road pavement wearing courses. Monitoring the development of skid resistant properties over time showed that the SMA 11 S wearing course achieves satisfactory skid resistant properties even after 14 years in service, even with higher traffic volumes. In the case of the SMA 8 NH wearing course, such high durability was observed in wearing courses with high-quality aggregate in terms of its resistance to polishing. In terms of the relationships between parameters, it turned out that these relationships vary and that when searching for a connection between the friction coefficient and macrotexture, it may be beneficial to use other parameters expressing macrotexture, in particular skewness Rsk, or the newly proposed parameter MTX A .
Machel et al. (Sun,) studied this question.