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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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Term of the Road Dictionary

macrotexture

Language : PIARC Road Dictionary / English
Theme : Operations Road Surface Characteristics
Definition : Surface irregularities of a road pavement with horizontal dimensions ranging between 0.5 and 50 mm and vertical dimensions between 0.2 and 10 mm. Note: macrotexture is related to aggregate size, mixture design and laying (compaction), as well as to the surface treatment applied (if any). It has wavelengths in the same order of size as tyre tread elements in the tyre-road interface.