Durable Wearing Surfaces for HMA

The Colorado Department of Transportation (CDOT) spends a large sum of money each year on the design and placement of new asphalt pavements. Inevitably, these pavements will need rehabilitation. Wearing surfaces provide an alternative to CDOT's current rehabilitation strategies. A pavement design system incorporating wearing surfaces will both protect the existing pavement structure and provide a quality overlay system for all pavements. This research study will evaluate the durability of selected wearing surfaces on CDOT's highways.