|boundary = urban|
|It is the urban area of the "city / village" limited by the entrance/exit signs of the zone "traffic_sign=city_limit".|
|Used on these elements|
|Status: in use|
|Tools for this tag|
boundary=urban is used to mark boundaries the urban area of the "city/village" limited by the entrance/exit signs of the zone traffic_sign=city_limit traffic_sign=city_limit. This area is a legal polygone defined by an administrative authority.
These zones make it possible to differentiate the urban area of a (city/village) and to be able to apply different regulations to the inside or outside of this zone. In addition, the surface representation of this area also makes it possible to calculate a "size" and thus to be able to use it. This urbanized area includes residential, commercial and industrial areas
Search for "traffic_sign=city_limit" not being a node of a "boundary=urban" polygon
Queries overpass_turbo : 
Specificities induced by urban area for different countries
The table below provides information on boundary traffic sign, the source of the definition, the regulations induced by these urban areas ... without being exclusive.
What is the urban area ?
|Country||Name||Definition||Traffic sign||Circulation traffic||Aviation||Other
|"Agglomération"||Definition par Traffic Laws : article 2.12 ||F1 for enter F3 for exit||* default maxspeed: 50 ,..||...||...|
|France||"Agglomération"||Definition par Traffic Laws : article R110.2  It is different of the statistique name "aire urbaine"||EB10 EB20||* maxspeed default: 50 * standing person transport vehicle outside urban maxspeed=70 * Use of regulated lighting lights * use of the horn * retroreflective vest for cyclists outside the urban area, ...||The height of overflight by an aircraft is regulated ||* mayor's police law  * advertisment display : 
- For routing is it easy to apply a default speed inside this perimeter