This report evaluates information on the permanent deformation characteristics of asphalt-aggregate mixtures, with an emphasis on laboratory test techniques for measuring mixture resistance to permanent deformation, and on methods for prediction of permanent deformation (rutting) in the upper asphalt-bound layers of pavement structures. Factors influencing the amount of rutting are summarized; the influence of mixture density and aggregate structure emphasize the importance of proper preparation of test specimens to duplicate in situ conditions. The laboratory test methods associated with the predictive methodologies that are evaluated include: a) uniaxial and creep tests; (b) uniaxial and triaxial repeated load test; c) triaxial dynamic tests; d) diametral tests, creep and repeated load tests; e) hollow cylinder tests, combined axial and torsional loading; f) simple shear tests, unconfined and confined; and g) wheel-track tests. From these evaluations, specific test methodologies, either existing or new, that have the potential to define the propensity for rutting of dense-graded paving mixtures, are ranked in order of preference.