Introductory technical guidance for civil engineers and construction managers interested in street and highway pavement preservation using thin asphalt overlays. Here is what is discussed:1. INTRODUCTION2. BENEFITS AND LIMITATIONS3. WHEN TO APPLY4. DENSE-GRADED ASPHALT MIXTURE DESIGN FOR THIN ASPHALT OVERLAYS5. PRESERVATION PROJECT DEVELOPMENT AND PAVEMENT STRUCTURE DESIGN6. CONSTRUCTION PRACTICES AND QUALITY CONTROL7. PERFORMANCE8. SUMMARY.