Characterization, Modeling, and Performance of Geomaterials contains 27 peer-reviewed papers presented at the GeoHunan International Conference, Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics, which took place in Changsha, Hunan, China from August 3 to 6, 2009. This Geotechnical Special Publication showcases recent developments and advancements in geotechnical and pavement engineering, and offers insights into future directions for geoengineering in the 21st century. Ranking: Moderate.