Transportation Research Record 1547 contains the following papers: Analysis of resilient modulus of dense- and open-graded aggregates; Influence of aggregate properties on performance of heavy-duty hot-mix asphalt pavements; Aggregate characteristics governing performance of seal coat highway overlays; Evaluation of laboratory procedures for aggregate polish test; Coarse aggregate effects on elastic moduli of concrete; Evaluation of frost resistance tests for carbonate aggregates; Testing methodology for resilient modulus of base materials; Evaluation of pavement bearing characteristics using Florida limerock bearing ratio test; Steady-state strength, relative density, and fines content relationship for sands; Influences on permanent deformation behavior of unbound granular materials; Effect of aging on freshly deposited or densified calcareous sands; Shakedown of subgrade soil under repeated loading; Lincoln Avenue reclaimed asphalt pavement base project; Use of shredded rubber in unbound granular flexible pavement layers.