- Road metal
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For other uses, see Metal (disambiguation).
The term road metal refers to the crushed rock used for road beds, surfaces, 'all-weather' walkways and paths, foundations, and railway embankments, among other things. The use of road metal dates back to antiquity.
History
The word metal comes from the Latin "metallum" and the Greek "metallon" meaning "mine, quarry, ore, metal". The reference to crushed rock thus becomes more apparent. It was more recently pioneered by John Loudon McAdam in the late 18th century.[citation needed]
The term is relatively rarely used today, with "gravel" being more typically used and understood. One of the places where it is still in common usage is New Zealand.
See also
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