TRB’s National Cooperative Highway Research Program (NCHRP) Report 557: Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements examines performance-based procedures to test aggregates for use in pavements utilizing hot-mix asphalt (HMA) mixtures and provides guidance on using these procedures for evaluating and selecting aggregates for use in specific mixture applications. The appendices to NCHRP Report 557 are available as NCHRP Web-Only Document 82: Validation of Performance-Related Test of Aggregates for Use in Hot-Mix Asphalt Pavements: Appendixes A through F.