Key:hazard

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Public-images-osm logo.svg hazard
DIN 4844-2 Warnung vor einer Gefahrenstelle D-W000.svg
Description
A hazardous or dangerous feature Edit or translate this description.
Group: Hazards
Used on these elements
may be used on nodesmay be used on waysmay be used on areasshould not be used on relations
Documented values: 27
Useful combination
Status: approvedPage for proposal

Wikidata

A hazard is a potential source of damage to health, life, property, or any other interest of value (see Hazard). Hazards include natural features of the environment as well as those of human origin.

Values

The following tables describe tagging for various types of tagging.

Area Hazards

This table describes values of hazard=* for areas tagged with boundary=hazard.

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This table is auto-generated. See Taginfo/Taglists for a documentation on it.

Traffic Hazards

The following values of hazard=* are used to tag signed hazards on roadways.

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This table is auto-generated. See Taginfo/Taglists for a documentation on it.

Tagging Guidelines

The hazard=* tag is intended to tag hazards that are explicitly declared by posted signage and/or government declaration. Consistent with OSM conventions, mappers should only tag hazard features that are permanent or recurring, rather than temporary.

Roadside Signage

For tagging roadside signs, there are multiple possible approaches:

  • Place a node adjacent to the roadway, and tag it with traffic_sign=hazard and the appropriate hazard=* tag.
  • Tag a node in the roadway, with traffic_sign=hazard + hazard=* at the location adjacent to where the sign is located. If known, mappers might instead use traffic_sign=* with the specific traffic sign ID, also combined with hazard=*.
  • For hazardous curves, apply hazard=curve to the way starting from the signed location and extending through the curve.
  • For hazards that occur along a defined stretch of roadway, apply the appropriate hazard=* to the way representing the portion of the road for which the hazard applies. This should only be done where there is adequate data available to apply the hazard tagging to a stretch of roadway, such as in cases where the start and end of the hazard are signed, or when a sign indicates the oncoming distance over which the hazard occurs.
  • Some combination of the above, in which both the sign and the actual hazard are tagged.

Verifiability Guidelines

Mappers should not tag subjective hazard features which cannot be confirmed or denied even when visiting the location in person. Examples of how hazards can be verified include:

  • Hazards to drivers and pedestrians indicated by signage, including roadside signs.
  • Hazards to health and safety indicated by fences or other barriers with posted signs
  • Government-declared hazardous areas as marked on government maps and/or GIS systems

References