Mr. Hubbard joined the newly-formed Asphalt Institute in 1919 to begin a period of research that was of great importance nationally, both to highway development and to the asphalt industry. As head of the Asphalt Institute's laboratory research program, Mr. Prevost Hubbard's work provided much of the sound scientific background that led to the development of modern construction techniques for asphalt pavements. His research has been of such importance that he has been called "The Dean Emeritus of Asphalt Research."
One of his most notable contributions was his joint effort with Mr. Frederick C. Field, Asphalt Institute Chemist, in formulating the Hubbard-Field Stability Test. This test, which focused attention on the importance of proper compaction, established a workable scientific basis for producing correct asphalt mixture designs, not only for highways but for many new asphalt paving uses as well.
Support and commitment is highlighted on a permanent plaque at the Asphalt Institute's Headquarters and Research Center in Lexington, KY.