Western Research Institute is a leader in asphalt chemistry and developing methods to understand how the physical properties of asphalts affect their performance over time. We have made substantial contributions to the Superpave specifications. WRI performs specialized research, as well as consulting to identify causes of problems with asphalts, additives or asphalt aggregate combinations or other unexplained road failuress. We perform non-routine chemical and physical analyses of asphalt materials. Our clients include the FHWA, State DOTs, refiners, roofing manufacturers and foreign natiion highway departments.