TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2207 contains 16 papers that explore direct measurements of volatile and semivolatile organic compounds, nano–titanium dioxide additive, performance of Superpave projects, coarse aggregate angularity, physical hardening, new low-temperature performance-grading method, and correlation of moisture loss and strength gain in chip seals. This issue of the TRR also examines the effect of PG XX-34 on transverse cracking, field performance of asphalts from multiple crude oil sources, intrinsic healing of asphalt binders, recyclability of polyphosphoric acid–modified asphalt, separation of thixotropy from fatigue process of asphalt binder, linear amplitude sweep test, oxidative aging of asphalt binders, pressure aging vessel and low-temperature properties of asphalt binders, and alternate shift factor relationship for describing temperature dependency of viscoelastic behavior of asphalt materials. (Author/publisher)
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