👉 The term "roadbed" in the context of construction, particularly in the realm of civil engineering and highway design, refers to the material or soil layer on which a roadway is laid. This type of material provides the foundation for the structure by absorbing shock and vibrations during traffic flow and also serves as a barrier against erosion and other forms of damage caused by vehicles. Roadbeds are typically composed of: 1. Soil: The primary material used in constructing roads, it can be gravel, crushed stone