the top layer of a road that carries the traffic; road surface: Also called: carpet, topping
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use wearing course in a sentence
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.