wearing course

noun

the top layer of a road that carries the traffic; road surface Also calledcarpettopping

If larger pebbles are allowed in the wearing course, the surface is certain to become rough after a time.

For the wearing course of the two-course type of pavement, a mixture of the same kind is very often specified.

The wearing course of the mixed macadam is composed of graded broken stone or gravel and a bituminous binder.

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