Effects of subsurface drainage on performance of asphalt and concrete pavements.

This report presents the findings of a research project to evaluate the effects of subsurface drainage features on the performance of pavements through a comprehensive analysis of data available through June 2001 from the Long Term Pavement Performance experiments. The report will be of particular interest to engineers in the public and private sectors with responsibility for the design, construction, and rehabilitation of highway pavements. (Author/publisher) This report may be accessed by Internet users at http://trb.org/publications/nchrp/nchrp_rpt_499.pdf