Proposed features/Causeway

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causeway
Status: Proposed (under way)
Proposed by: *
Applies to: linear Way
Definition: A raised way allowing passage over water, marsh land, or unstable land such as sand.
Drafted on: 2009-12-01

Description

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 [1]).

--turbodog 06:22, 3 December 2009 (UTC)--turbodog 06:34, 2 December 2009 (UTC)

Rationale

There needs to be a way of representing causeways in OSM. Examples of causeways are the Holy Island causeway (road) and the Cramond Island causeway (footpath).

Bruce89 17:25, 10 March 2007 (UTC)

Tagging

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:

highway=motorway

causeway=pilings


railway=rail

causeway=embankment


highway=unclassified

causeway=yes

Examples

Lake Pontchartrain Causeway (causeway=pilings) - [2]

Hindenburgdamm (causeway=embankment - [3]

Venice causeway=yes - [4] -- Connecting Venice to the mainland, not the city itself. According to Wikipedia, there are both a rail causeway and a highway causeway.

Discussion

Sound additions and improvements are welcome on this page. However, please add discussion comments to the discussion page.