An extensive research program on asphalt mix fatigue was conductedjointly by the LCPC (French transportation research laboratories)and Scetauroute (French highway engineering agency) between 1990and 1994. The program included tests on the LCPC circular fatiguetest track and a theoretical analysis of the hehavior of structures.This article looks into the parts of the program dealing withthe fatigue tests and modeling. The aim of this program was toclarify the behavior in the laboratory and on pavements of asphaltmixes differing only in the type of asphalt. Additionally, itinvolved adding constituents to improve the design method in thecase of high-modulus asphalts. On the fatigue test track morethan 7 IO^6 load sequences were applied to twelve structures overthe course of three experiments. The experimental pavements revealedsimilar behavior in asphalt concrete of the same thickness, andthe good performance of high-modulus materials whenever properthicknesses were used. The model made it possible to determinea correlection coefficient in connection with rigid materialsfor the French pavement design method and brought out the valueof controlled-force tests.