## 1 Introduction  
The performance of asphalt mixtures can be further improved with the addition of polymer and crumb rubber modifications. Due to increased traffic volume and axle loads, polymer and crumb-rubber-modified mixtures have proven to be useful, considering their higher advantages in terms of the increase in operational temperature range of the pavements, both in cold and hot climatic conditions. However, the use of SBS and polymer modifications leads to extended budget requirements, hindering the application of such modifications throughout the road infrastructure system. During the pavement lifetime, based on the quality of design, material selection, and construction procedures employed, periodic maintenance is required after a certain specified time during the functional period of the pavement. Moreover, if there is a higher percentage of SBS used in asphalt mixtures, it will result in high initial construction costs as a result of costly material procurement. However, maintenance activities still need to be undertaken after a specified time, resulting in an overall increase in the operational cost of the pavement. However, compared to conventional asphalt mixtures, SBS-modified mixtures lead to fewer maintenance interventions and reduced costs. Costs during the pavement life cycle can be reduced by employing materials that are less costly for the same performance provided by SBS-modified bituminous mixture; however, they may yield better performance than the conventional SBS- or CR-modified asphalt mixtures. An alternative solution is to use an asphalt binder with added fibers. Therefore, instead of increasing the percentage of SBS or CR in the mixture, a small percentage, usually 0.3% of fiber, can be added to the mixture, thereby increasing the mixture's performance at a fraction of the cost. The different available fibers are ceramic fiber, glass fiber, and basalt fiber. Fibers offer different improvements to the properties of the asphalt mixtures, including higher resistance against permanent deformation, higher resistance against fatigue damage, increased operational temperature range, increased cohesion between bitumen and aggregates, increased high-temperature aging resistance, and increased mechanical stability for asphalt mixtures [1; 2; 3; 4]. Ceramic fiber has been previously used for improving the performance of asphalt mixtures and offers high-temperature resistance at lower costs [5]. Ceramic fibers offer high mechanical stability and oxidation resistance [6; 7]. For the CF, a clinker consisting of silica and alumina is melted at high temperatures, and fibers are formed by cold air blown into the designated formworks and CF are known to share the same performance level as basalt fibers [8]. Ceramic fibers can insulate the heat up to 1600 \({}^{\circ}\)C. The use of CF leads to increased interparticle friction and cohesion between the asphalt mixtures leading to better weight distribution of loads and decreased cracking [9]. The diameter of the ceramic fiber ranges from 2 \(\upmu\)m to 5 \(\upmu\)m with the length usually around 20 mm [10]. Basalt fiber originates from fine-grained volcanic rock and is then produced from fine fibers of basalt [11]. Basalt fiber is an inorganic material providing high tensile strength, temperature resistance, and chemical stability [12]. Basalt fibers have almost equivalent mechanical properties to that of steel fiber. Basalt fibers are considered environmentally friendly and the process of procurement and usage involves less CO\({}_{2}\) emissions [13]. The addition of basalt fibers increases the fatigue and stripping resistance of asphalt mixtures [14]. The addition of basalt fiber increases the tensile strength of the asphalt layer and its corresponding service life. Glass fiber is a non-metallic inorganic material and offers high tensile strength and high temperature resistance. Glass fiber is known to improve the cohesion and interparticle friction between the aggregates and binder, thereby resulting in an increased resistance to fatigue [15].