1.1 ,This test method describes a procedure for testing permanent deformation behavior and rutting resistance of compacted asphalt mixtures using a modified version of a loaded wheel tracker device2 utilizing controlled confining pressure. The test specimen is tested either dry or moisture conditioned. A laboratory roller compactor or its equivalent is used to prepare test slabs of 305 mm by 305 ,mm [12 ,in. by 12 ,in.] and thickness 50 mm, 75 mm, or 100 ,mm [2 ,in., 3 ,in., or 4 ,in.] depending on the nominal maximum aggregate size. The thickness of the specimen must be at least two and half times the nominal maximum aggregate size. Alternatively, saw-cut slab specimens with dimensions 305 mm by 305 mm [12 ,in. by 12 ,in.] and thickness 50 mm to 100 mm [2 ,in. to 4 ,in.] may be secured from the field.