wearing course

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wearing course

[′wer·iŋ ‚kȯrs]
(civil engineering)
The top layer of surfacing on a road.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

wearing surface, wearing course

1. The top layer of surfacing which carries vehicular traffic.
2. Same as topping.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.