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Explanation:
The key principles and considerations in the design and implementation of flexible pavement systems focus on ensuring durability, performance, and longevity. These include:
1. **Material Selection**: Using high-quality asphalt and aggregates that withstand loads and environmental conditions.
2. **Layer Design**: Structurally designing layers (subgrade, base, sub-base, and surface) to distribute loads efficiently.
3. **Drainage**: Ensuring proper drainage to prevent water damage and weakening of pavement layers.
4. **Compaction**: Achieving adequate compaction during construction to enhance load-bearing capacity and reduce settlement.
5. **Maintenance**: Implementing regular maintenance practices to address wear and tear and extend pavement life.
6. **Environmental Considerations**: Designing to withstand temperature variations, freeze-thaw cycles, and other local environmental factors.
7. **Load Considerations**: Accounting for expected traffic loads and frequencies to design pavements that resist deformation and fatigue.
By addressing these principles, flexible pavement systems can achieve enhanced durability, optimal performance, and extended longevity, ensuring a reliable transportation infrastructure.