Which property describes HMA's ability to withstand weathering and traffic over time?

• A. Flexibility
• B. Stability
• C. Durability
• D. Fatigue Resistance

Answer: (C)

Durability describes HMA's ability to resist weathering and traffic over time. It captures how well the mix holds up under environmental effects like moisture, temperature changes, and binder aging, as well as under the demands of repeated traffic loads, without deteriorating quickly into cracking, rutting, or raveling. In other words, durability is about long‑term performance and life of the pavement. Flexibility focuses on how well the material can bend with movement without cracking, which is important but doesn’t cover long-term endurance. Stability relates to resistance to deformation under a sudden load in a test, not the pavement’s behavior over years. Fatigue resistance deals with cracking from repeated loads, but durability is the broader concept that includes weathering as well as traffic effects.