Junctions

From OpenStreetMap Wiki
(Redirected from Roundabouts)
Jump to: navigation, search
Available languages — Junctions
· Afrikaans · Alemannisch · aragonés · asturianu · Aymar aru · azərbaycanca · Bahasa Indonesia · Bahasa Melayu · bamanankan · Bân-lâm-gú · Basa Jawa · Basa Sunda · Baso Minangkabau · bosanski · brezhoneg · català · čeština · corsu · 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 · Latina · latviešu · Lëtzebuergesch · lietuvių · Limburgs · magyar · Malagasy · Malti · Nederlands · Nedersaksies · norsk · norsk nynorsk · occitan · Oromoo · oʻzbekcha/ўзбекча · Plattdüütsch · polski · português · română · shqip · slovenčina · slovenščina · Soomaaliga · suomi · svenska · Tagalog · Tiếng Việt · Türkçe · Türkmençe · Vahcuengh · vèneto · walon · Wolof · Yorùbá · Zazaki · isiZulu · српски / srpski · авар · Аҧсшәа · башҡортса · беларуская · български · қазақша · Кыргызча · македонски · монгол · русский · тоҷикӣ · українська · Ελληνικά · Հայերեն · ქართული · नेपाली · भोजपुरी · मराठी · संस्कृतम् · हिन्दी · অসমীয়া · বাংলা · ਪੰਜਾਬੀ · ગુજરાતી · ଓଡ଼ିଆ · தமிழ் · తెలుగు · ಕನ್ನಡ · മലയാളം · සිංහල · བོད་ཡིག · ไทย · မြန်မာဘာသာ · ລາວ · ភាសាខ្មែរ · ⵜⴰⵎⴰⵣⵉⵖⵜ · አማርኛ · 한국어 · 日本語 · 中文(简体)‎ · 中文(繁體)‎ · 吴语 · 粵語 · ייִדיש · עברית · اردو · العربية · پښتو · سنڌي · فارسی · ދިވެހިބަސް
Logo. Feature : Junctions
One example for Feature : Junctions
Description
Related to junctions between roads
Tags

See Editing Standards and Conventions#Junctions for editing basics.

Road intersections

Simple intersections

A simple intersection is represented by the ways for the two roads sharing a common node.

Dual carriageway intersections

When a single carriageway intersects a dual carriageway (on the same level), the junction is represented by two nodes and a small section of the single carriageway (left image). When two dual carriageways intersect, the junction is represented by four nodes and four small sections (right image).

height=200px height=200px

When all sections of a carriageway have the same attributes, they can be represented by a single OSM-way going through. Once attributes are different, such as having turn:lanes=* or destination=* mapped, they become split into individual OSM-ways.

Representing a road area by a linear OSM-way is an abstraction for routability. In analogy, the four nodes and the inner way sections of a dual carriageway junction are an abstraction from the real junction area (grey in the example images), also required for routing. This can however lead to problems for assigning the name=* tag. Obviously, the pink segments m and n in the pictures can be named as A-Road without a conflict. On the other hand, the blue segments p and q might be named either B-Road or C-Road, or given no name at all. Similarly, the destination=* should be tagged on the outer segments where things are unambiguous.

Roundabouts

Roundabouts should be tagged as junction=roundabout.
Small roundabouts where the middle can be traversed by vehicles should be tagged as highway=mini_roundabout.

Traffic control

Intersections with stop signs should be tagged highway=stop.
Intersections with traffic signals should be tagged highway=traffic_signals.

Waterway crossing

A ford (where automobiles, pedestrians, or horses enter the water to cross a stream or river) should be tagged as ford=*.

Rail/road level crossings

Rail/road level crossings should be tagged as railway=level_crossing.

Pedestrian road crossings

Pedestrian road crossings (UK:Zebra Crossings; US:Crosswalks) should be tagged as highway=crossing. Pedestrian rail crossings should be tagged railway=crossing.

Proposals

  • highway=junction: Proposal for mapping the extent of junctions and to reduce the number of needed relations