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Subbase
Layer of a paved road
EntityQ2497229
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4 identifiers linking Subbase across the web's reference databases
Layer of a paved road
4 identifiers linking Subbase across the web's reference databases
From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0
In highway engineering, subbase is the layer of aggregate material laid on the subgrade, on which the base course layer is located. It may be omitted when there will be only foot traffic on the pavement, but it is necessary for surfaces used by vehicles.