transport and machinery > road transport > road system > cross section of a road image

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Road: thoroughfare connecting two geographical points, usually urban centers.

See cross section of a road in : french | spanish

Line demarcating the edge of the roadway or, when in the center of the roadway, indicating that passing is prohibited.

Line demarcating the two lanes of the roadway and showing that passing is permitted.

Layer supporting the base course and the subbase and providing drainage.

Steeply sloped ground between the ditch and the bank and between the ditch and the shoulder.

Ditch parallel to the roadway; surface water drains into it.

Base of a roadway, made up of coarse compacted gravel, making the roadway solid and stable.

Natural land along the edge of the road.

Top foundation layer, made up of fine compacted material; the driving surface lies on it.

Area between the roadway and the ditch, providing the roadway lateral support; it is also a place for emergency stops.

Composed of the embankment and the earth foundation; the base rests on it.

Part of the ground that was not excavated during the road’s construction.

Layers of material used to build up or level the route the road is to take.

Series of layers above the embankment reducing stress exerted by the traffic and preventing the bed from deforming.

Roadway’s driving surface; it is smooth, impermeable and provides a good grip for vehicles.

Surface upon which vehicles drive.