Specifications include, but are not limited to: The South Dakota Department of Transportation uses reclaimed asphalt pavement (RAP) to reduce the cost of some hot mix asphalt mixtures, lessen the amount of virgin material needed for a surfacing project, and reduce the amount of material that otherwise would be disposed of in landfills. Research Objectives: 1) Compile and evaluate data on the state of practice for use of recycled asphalt binder rejuvenators. 2) Develop a testing protocol or procedure that can be used to evaluate recycled asphalt binder rejuvenators. 3) Evaluate a minimum of five binder rejuvenation products that could routinely be used in South Dakota. Research Tasks: 1) Meet with the project’s technical panel to review the project scope and work plan. 2) Review and summarize literature regarding use of asphalt binder rejuvenators. 3) Based on the results of Task 2, develop a survey instrument to be sent to selected U.S. state and Canadian provincial transportation departmentsto determine how they evaluate and use asphalt binder rejuvenators. 4) Submit a technical memorandum to the technical panel detailing the results of Task 2 & 3. 5) Upon approval of the survey instrument, conduct the survey and analyze results. 6) Based on literature search and survey results, propose testing procedures for both asphalt binders and asphalt concrete mixes to evaluate the effectiveness of asphalt binder rejuvenators, including methods to predict their long-term effect on pavement performance. Testing must involve a representative sample of five to ten rejuvenators selected by the researcher, to be tested at manufacturer’s recommended dosage with virgin binder, 20%, 35%, and 50% RAP materials, and virgin aggregate from the same source to allow for direct comparisons. 7) Submit a technical memorandum to the technical panel detailing the results of Task 5 & 6. 8) Conduct testing using the procedure approved in Task 6. 9) Submit a technical memorandum to the technical panel detailing the results of Task 8. 10) Develop recommendations for rejuvenator evaluation and use, including any new specifications and test methods.