Proposed features/junction details

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Additional junction details
Status: Draft (under way)
Proposed by: Johan_C
Tagging: junction:ref=[[Tag:junction:ref=<ref>|<ref>]]
Applies to: Way
Definition: Specify the ref of the junction a way belongs to
Drafted on: 2012-11-24

This proposal introduces the key junction:ref which allows to specify the reference of the junction a way belongs to.

Note: As of Nov 24th 2012 this key is already used about 6000 times according to taginfo.

Available languages — Key:junction:ref
· Afrikaans · Alemannisch · aragonés · asturianu · azərbaycanca · Bahasa Indonesia · Bahasa Melayu · Bân-lâm-gú · Basa Jawa · Baso Minangkabau · bosanski · brezhoneg · català · čeština · dansk · Deutsch · eesti · English · español · Esperanto · estremeñu · euskara · français · Frysk · Gaeilge · Gàidhlig · galego · Hausa · hrvatski · Igbo · interlingua · Interlingue · isiXhosa · isiZulu · íslenska · italiano · Kiswahili · Kreyòl ayisyen · kréyòl gwadloupéyen · Kurdî · latviešu · Lëtzebuergesch · lietuvių · magyar · Malagasy · Malti · Nederlands · Nedersaksies · norsk bokmål · norsk nynorsk · occitan · Oromoo · oʻzbekcha/ўзбекча · Plattdüütsch · polski · português · português do Brasil · română · shqip · slovenčina · slovenščina · Soomaaliga · suomi · svenska · Tiếng Việt · Türkçe · Vahcuengh · vèneto · Wolof · Yorùbá · Zazaki · српски / srpski · беларуская · български · қазақша · македонски · монгол · русский · тоҷикӣ · українська · Ελληνικά · Հայերեն · ქართული · नेपाली · मराठी · हिन्दी · অসমীয়া · বাংলা · ਪੰਜਾਬੀ · ગુજરાતી · ଓଡ଼ିଆ · தமிழ் · తెలుగు · ಕನ್ನಡ · മലയാളം · සිංහල · ไทย · မြန်မာဘာသာ · ລາວ · ភាសាខ្មែរ · ⵜⴰⵎⴰⵣⵉⵖⵜ · አማርኛ · 한국어 · 日本語 · 中文(简体)‎ · 吴语 · 粵語 · 中文(繁體)‎ · ייִדיש · עברית · اردو · العربية · پښتو · سنڌي · فارسی · ދިވެހިބަސް
Public-images-osm logo.svg junction:ref
Osm element key.svg
Group: Highway
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasuse on relations unspecified
Status: In usePage for proposal

Rationale

Nowadays the big suppliers of navigational devices offers a roadsign view. The key destination=* and Proposed features/Destination details offer support for a roadsign view. The key junction:ref is necessary to support the roadsign view of both exit numbers as can be seen on these signs.

A12 Den Haag junction 2 and 3 signs.jpg

Tagging

Tagging scheme
Tag Description Example
junction:ref=* Reference number. 16


Examples

Tags Description
junction:ref=2 Exit 2. This key should be used on the left way directly behind the motorway_junction node.
junction:ref=3 Exit 3. This key should be used on the right way directly behind the motorway_junction node.

Common questions

Why not stick to the ref=* in motorway_junction=*?

Good question. For normal motorway_exits the ref in the motorway_junction would be sufficient. However, there are some other reasons which make it more logical to use junction:ref.

1. Consistency in tagging. All other information to support a Roadsign view is stored in OSM ways, like maxspeed=*, lanes=*, destination=*, destination:ref=*. So why shouldn't the junction:ref info be stored in the way?

2. The current tagging of the motorway_junction node does not support the situation as shown above

Why not deprecate motorway_junction?

It's used too many times already. And it looks good in a renderer like Mapnik.

Why name it junction:ref?

It's consistent with other tagging, like destination:lanes=* and destination:ref=*

Why not use ref=*?

The ref of the motorway_link is quite often the same as the ref of the motorway, like "A 3".

Comments

Please use the Discussion page for this.

Related keys

See also