Fig. 11 shows the rut-resistance of all test series. In this figure, the effects of amorphous metallic fibers and asphalt binder contents on the rut-resistance of AC are demonstrated. For this, the specimens were subjected to repeated passes of a loaded wheel (2500 load cycles), with the wheel speed set at 42 passes per minute. The greatest resistance to rutting by the repeated passage of a loaded wheel was obtained in the AC specimen (smallest plastic deformation). The specimens containing 1% amorphous metallic fibers exhibited higher plastic deformation than that in the specimen without fibers (AC). This is evidence that the use of amorphous metallic fibers in asphalt concrete mixtures provides adverse effects in improving the rut-resistance of AC. As compared with ordinary AC used in the present study, the use of stone mastic asphalt, developed in the 1960s, can be a solution to overcome the drawback (i.e., increased plastic deformation) of using amorphous metallic fiber, since it contains a large amount of coarse aggregate, leading to a decrease of binder content, and exhibits high rut- resistance. Therefore, a further study on the rut-resistance of stone mastic asphalt with amorphous metallic fiber is required to