TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 388: Pre-Overlay Treatment of Existing Pavements explores current pre-overlay treatment practices of state departments of transportation for both hot-mix asphalt and portland cement concrete pavement structures.  The report is designed to help pavement management and pavement design groups in their selection of pre-overlay treatments. The final report is available at https://www.trb.org/news/blurb_detail.asp?id=10051