Summary: A procedure for estimating the remaining fatigue life of existing bituminous pavements is developed. This procedure incorporates laboratory fatigue data for tensile strain or surface curvature in terms of repetitions to failure. It also utilizes laboratory data on reduction of flexural stiffness with load repetitions. The proposed method is applied to investigate the remaining fatigue life of a conventional asphalt concrete mix – dense graded (CAC-DG) and an asphalt-rubber hot mix – gap graded (ARHM-GG) using laboratory flexure fatigue data and multilayer elastic analysis of typical pavement sections. Results show that for a given initial state of fatigue damage, the remaining fatigue life of ARHM-GG could be significantly linger that CAC-DG. It is also illustrated that thinner sections of ARHM-GG, compared with CAC-DG, will exhibit the same remaining fatigue life. This reduction in thickness becomes more significant with increasing foundation support under the pavement surface layer.