Asphalt pavements account for a large amount of the road transportation system in Vietnam for its ease of construction and maintenance, and the smoothness that it provides to the vehicles while circulating on the pavement. As compared with cement concrete pavement, asphalt pavement has shorter service life due to two major distresses: rutting and fatigue cracking. Many solutions have been studied and carried out on the asphalt mixtures in order to reduce the issues of rutting, such as modifying these mixtures using a variety of additives or using a smaller amount of bitumen in an attempt to enhance their resistance to rutting. While trying to deal with the permanent deformation, the flexibility of modified asphalt mixtures significantly diminishes in comparison to unmodified mixtures, resulting in a decreased resistance to fatigue cracking. As a result, fatigue cracking tends to occur with increasing frequency and at an earlier stage following the commencement of traffic flow. Using fiber additives is a good issue for this problem. This study seeks to assess the efficiency of Forta-Fi fiber in improving the cracking resistance of different types of bituminous mixtures. The Marshall approach was employed for sample compaction and mix design, while the semi-circular bend test was utilized to assess the cracking resistance and durability of the bituminous mixtures. The experimental results demonstrate that adding 0.1% Forta-Fi fiber to asphalt mixtures considerably improves their fatigue resistance.