4[2]Georgia Department of Transportation progress in opengraded friction course development Watson,Donald(Georgia Department of Transportation);Johnson,Andrew;Jared,David Source:Transportation Research Record,n 1616,Aug,1998.
5Kandhal P S, Lockett L. The Construction and Performance of Uhrathin Asphalt Friction Course[ J]. National Center for As- phalt TeChnology ~( NCAT), Report No. 97 - 5,1997.
6Estakhri C K, Button J W, et al. Evaluation of Uhrathin Fric-tion Course [ J]. Transportation Research Record, 1994, (1454) :9 - 18.