A Review of Polymer‐Modified and Fiber‐Reinforced Asphalt Pavements for Hot‐Climate Applications

High pavement temperatures and increasing traffic loads significantly accelerate rutting, cracking, and permanent deformation in asphalt pavements, particularly in hot‐climate regions. To address these challenges, various asphalt modification technologies have been developed, among which styrene–butadiene–styrene (SBS) polymer modification and fiber reinforcement have received considerable attention because of their ability to enhance mechanical performance and pavement durability. The current review comprehensively discusses different types of asphalt systems modified with polymers as well as reinforced with fibers, including SBS, ethylene‐vinyl acetate (EVA), polyethylene (PE), as well as crumb rubber (CR), nanomaterials, and other fibers and hybrid systems, with prime focus on the stress–strain performance of SBS and fiber‐modified hot mix asphalt in hot climates. The mechanisms through which these modifiers improve rutting resistance, cracking resistance, moisture susceptibility, and aging performance are discussed. In addition, the review evaluates the advantages and limitations of individual modifiers and highlights recent developments in hybrid SBS–fiber systems that combine polymer elasticity with fiber reinforcement. Findings from previous studies indicate that SBS significantly improves binder elasticity and high‐temperature stability, while fibers enhance structural integrity and crack resistance through the formation of reinforcing networks within asphalt mixtures. Hybrid systems have shown promising performance, although their superiority over single modifiers depends on material compatibility, dosage, and comparable testing conditions. The review also identifies current research gaps related to long‐term field performance, modifier compatibility, sustainability assessment, and optimization of hybrid systems. The findings provide guidance for developing durable and sustainable asphalt pavements for hot‐climate regions.