TRB’s National Cooperative Highway Research Program (NCHRP) Report 676: Intelligent Soil Compaction Systems explores intelligent compaction, a new method of achieving and documenting compaction requirements. Intelligent compaction uses continuous compaction-roller vibration monitoring to assess mechanistic soil properties, continuous modification/adaptation of roller vibration amplitude and frequency to ensure optimum compaction, and full-time monitoring by an integrated global positioning system to provide a complete GPS-based record of the compacted area.

Appendixes A through D of NCHRP 676, which provide supplemental information, are only available online; links are provided below.
• Appendix A: Supplement to Chapter 1
• Appendix B: Supplement to Chapter 3
• Appendix C: Supplement to Chapter 6
• Appendix D: Supplement to Chapter 8