The Symposium on Viscosity Testing of Asphalt and Experiencewith Viscosity Graded Specifications was presented at theSeventy-fifth Annual Meeting of the American Society for Testingand 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 ofSciences, presided as symposium chairman.