Patching is measured in square feet (square meters) of surface area. However, if a single patch has areas of differing severity levels, these areas should be measured and recorded separately. For example, a 25 ft² (2.5-m²) patch may have 10 ft² (1 m²) of medium severity and 15 ft² (1.5 m²) of low severity. These areas should be recorded separately. Any distress found in a patched area will not be recorded; however, its effect on the patch will be considered when determining the patch’s severity level.
A very large patch, (area > 2500 ft² (230 m²)) or feathered-edge pavement, may qualify as an additional sample unit or as a separate section.