|Definition:||A raised way allowing passage over water, marsh land, or unstable land such as sand.|
A causeway is a way which is raised in order to allow passage over water, marshland or unstable land, such as loose sand. A causeway may be supported by either an earthen embankment or by pilings of concrete or wood. A causeway on pilings is distinguished from a bridge by it's low height and extended length, as well as the fact that the pilings are usually closer together than the pilings for a bridge span.
Causeways over water are usually of sufficient height to maintain the way surface above water for all normal weather and tidal conditions, however, some which cross tidal waters may be submerged at high tides (see Holy Island Causeway, for example ).
Bruce89 17:25, 10 March 2007 (UTC)
Since a causeway is a way for transportation, it is associated with a highway or railway. Since it can be supported by either an embankment or pilings, then the proper tag values are "embankment", "pilings", or when the base structure is unknown, "yes". Thus, the following are typical causeway tags:
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