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Chipseal (also chip seal) is a pavement surface treatment that combines one or more layer(s) of asphalt with one or more layer(s) of fine aggregate. In the United States, chipseals are typically used on rural roads carrying lower traffic volumes, and the process is often referred to as "asphaltic surface treatment". In Australia and New Zealand chipsealing is used on a larger percentage of roads, both rural and urban. This type of surface has a variety of other names including "tar and chip", "sprayed seal" or "surface dressing".