The Symposium on Viscosity Testing of Asphalt and Experience with Viscosity Graded Specifications was presented at the Seventy-fifth Annual Meeting of the American Society for Testing and Materials held in Los Angeles, Calif., 25—30 June 1972. Committee D04 on Road and Paving Materials sponsored the symposium. W. G. Gunderman, Highway Research Board, National Academy of Sciences, presided as symposium chairman.