This issue contains 17 papers on the following aspects of soil mechanics: estimating the resilient modulus of subgrade soils using the falling weight deflectometer; quality management of base materials with seismic methods; characterization of a two-layer soil system; performance-based design of deep foundation systems; analysis method for drilled shaft-stabilized slopes; standard penetration test hammers; cone penetration test sounding and pile driving; stiffness of reinforced asphalt pavement over soft organic soils; variability in construction of cement-treated base layers; field rutting performance of various base and subbase materials; resilient modulus of stabilized clay subgrades; modeling of cementitiously stabilized layers in the "Mechanistic-Empirical Pavement Design Guide"; combined use of calcium chloride and fly ash in road base stabilization; soil stabilization with bioenergy coproduct; soft soil stabilization using high-vacuum dewatering with dynamic compaction; post-soil interactions on guardrails near the crown of a slope; and mechanically stabilized earth wall corrosion.