The research results in this report concern the characterization of physical properties of asphalt binders and the development oh test procedures for aging and adhesion. Asphalt binders were shown to be liniear viscoelastic materials at expected pavement straints. Test methods and models describing rheological behaviour were developed with the assumption of linear behavior. A mathematical model that contains parameters that can be used to relate physical and chemical parameters was developed. The test methods and models allow the stiffness of asphalt binders to be characterizedas as a function of loading time and temperature with the dynamic shear rheometer at intermediate to upper pavement surface temperatures and with a newly developed bending beam rheometer at low temperatures, where thermal cracking is importans. To characterize fracture properties, the project developed a direct tension test, in which failure strain, stress, and energy are determined as functions of loading time and temperature. Limited work on fatigue properties at low temperatures successfully related them to tensile properties. A new phenomenon, low-temperature physical hardening, was identified during the project. This phenonmenon results in increased stiffness of the binder when it is held at a constans temperature at room temperature or below. The blister test for quantitative measurement of adhesion between asphalt binder and aggregate surfaces was found to be infractical. The investigation of various factors, including film thickness, aging temperature, the effect of oxygen versus air, and the effect of mineral surfaces, led to a new aging procedure for simulating in-service oxidative hardening of asphalt binders, which was adopted as part of the new SHRP binder specification.