Cold in-place recycling is the process of recycling asphalt pavement to produce a rehabilitated pavement. CIR is used to eliminate surface irregularities and ruts and to improve pavement profile and ride quality. Economic and environmental advantages are also realized from recycling existing road materials.

The process is performed at the road site and uses many pieces of equipment (tanker trucks, milling machines, crushing/screening units, mixers, pavers, rollers) to recycle 100% of the RAP generated. The CIR treatment depth is 2-6 inches (50-150 mm), depending on the original pavement depth and design criteria.