The indirect tensile strengths of all test specimens are summarized in Fig. 13. The highest indirect tensile strength was found to be 1.08 MPa in the AC specimen without fibers and in the A-AC with an asphalt binder content of 5.5%. The indirect tensile strength decreased with an increase in the asphalt binder content in the case of AC with fibers. Therefore, the lowest indirect tensile strength (0.91 MPa) was found for A-AC with an asphalt binder content of 6.5%. This value is approximately 84% of the strength of AC or A-AC with a 5.5% asphalt binder content. Even though several previous studies have reported that the indirect tensile strength of AC increases by including polymeric fibers, the work of Jenq et al. [24] noted that polyester and polypropylene fibers do not significantly influence the tensile strength of AC. In addition, the work of Liu et al. [10] reported that the indirect tensile strength of AC increased by the inclusion of steel fibers up to a volume fraction of 11%, and beyond that point, the tensile strength started to decrease with an increase in fiber volume content. The amorphous metallic fibers used in this study have a very small cross-sectional area, so the number of amorphous metallic fibers per cubic meter is approximately 16 times higher than that of conventional hooked steel fibers at the same length [25]. Therefore, although only 1 vol. % amorphous metallic fibers were included in the AC mixture, the actual number of amorphous metallic fibers might be similar to that of 16 vol.% conventional steel fibers. For this reason, the tensile strength of A-AC was equal to or smaller than that of AC without fibers.