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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

concrete paving block

Language : PIARC Road Dictionary / English
Theme : Roads Materials General Items
Definition : Precast concrete unit used as a surfacing material that satisfies the following conditions: - at a distance of 50 mm from any edge, any cross section does not show a horizontal dimension less than 50 mm; - its overall length divided by its thickness is less than or equal to four. Note: these two conditions are not applicable to complementary fittings [CEN].