Local Civil Engineer

Pavement Road Construction Components & Cross Section

A pavement road is built in layers to safely transfer vehicle loads to the ground. Each layer has a specific function for strength, durability, and drainage.

Layers:

1. Wearing Course – Top asphalt layer providing a smooth and skid-resistant surface.

2. Binder Course – Connects the surface layer with lower layers and distributes loads.

3. Base Course – Main structural layer carrying traffic loads.

4. Sub-Base Course – Improves drainage and provides additional support.

5. Subgrade – Compacted natural soil forming the foundation of the pavement.

Key Features:

Carriageway: Area used by vehicles.

Shoulder: Supports pavement edges and emergency stopping.

Camber: Slight slope for quick rainwater drainage.

Berm: Side area for stability and maintenance.

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