Thin asphalt overlays are popular approaches to pavement preservation because of their ability to provide improved ride quality, reduce pavement distresses, maintain surface geometrics, reduce noise levels, reduce life cycle costs and provide long-lasting service.
An "overlay" is the paving of a second layer of asphalt over existing asphalt. An overlay can be done when the existing asphalt is in overall good condition but may have some problem areas. Depending on the degree of cracking, crumbling or sunken areas, those areas can be cut out, patched and then a new layer can be paved. The new layer of asphalt will follow the old asphalt cracks (reflective cracking) and waves in a very short period of time.
Benefits of Asphalt Overlays
- Reduced initial costs, in addition to the lower life cycle costs
- The ability to handle heavy traffic
- A smooth, sealed surface
- Restored skid resistance
- No loose stones or binder runoff
- Minimized dust
- Recyclability