10/12/2025
Pavement Structure Layer-by-Layer Breakdown.
This illustration shows a clear cross-section of a standard flexible pavement system. Each layer is highlighted to demonstrate how a durable and long-lasting road is constructed:
Wearing Course (Asphalt): The topmost surface layer that provides smooth driving comfort and resists traffic loads.
1. Base Course (Crushed Stone): Provides structural strength and distributes loads.
2. Second Base Layer (Crushed Stone): Enhances stability and supports upper layers.
3. Sub-Base Course (Aggregate): Acts as a foundational support layer and improves drainage.
4. Subgrade (Natural Soil): The existing ground, properly compacted to carry all the loads above.
This visual perfectly illustrates how proper layer composition is essential for road performance, durability, and long-term serviceability.
Engineer
