Which factors influence material selection in highway construction?

The selection of materials in highway construction is primarily influenced by load requirements, environmental conditions, and durability. Load requirements pertain to the expected traffic load that the highway will accommodate, ensuring that the materials chosen can withstand the stresses and strains caused by vehicles over time. Environmental conditions are crucial as certain materials perform better in specific climates; for instance, freeze-thaw cycles, humidity, and temperature variations can significantly impact the longevity and performance of highway materials. Durability is a key factor as well, as materials must resist wear and tear, corrosion, and degradation to maintain structural integrity throughout their lifecycle. Selecting materials based on these factors ensures that the finished highway is safe, cost-effective, and sustainable for its intended use.