Flooding and standing water can significantly reduce the lifespan of roads, especially those with flexible pavements. Saturated subgrades lose stiffness and strength, leading to faster deterioration through cracking, rutting, and other forms of distress. This not only increases maintenance costs but also poses risks to transportation safety and efficiency. With 93% of U.S. paved roads being flexible pavements, the cumulative effects of repeated flooding could lead to higher repair costs and reduced road serviceability. As climate change drives more frequent and intense rainfall events, the risk of road damage and associated economic impacts is expected to grow, making it critical to address these vulnerabilities in road design and maintenance strategies.