Junctions
 Feature page: Junctions
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| Description |
| Related to junctions between roads |
| Tags |
Contents |
How to Map
Pedestrian road crossings (UK:Zebra Crossings; US:Crosswalks) should be tagged as highway=crossing. Pedestrian rail crossings should be tagged railway=crossing
Road intersections: Small roundabouts should be tagged as highway=mini_roundabout. Intersections with stop signs should be tagged highway=stop. Intersections with traffic signals should be tagged highway=traffic_signals.
Gates should be tagged as barrier=gate. Stiles (stairs allowing pedestrians to cross a fence, but preventing animals from same) should be tagged as barrier=stile. Cattle grids should be tagged as barrier=cattle_grid. A ford (where automobiles, pedestrians, or horses enter the water to cross a stream or river) should be tagged as highway=ford or perhaps ford=* .
Rail/road level crossings should be tagged as railway=level_crossing.
Tags
| Type | Tag | Description |
|---|---|---|
  |
junction=roundabout highway=mini_roundabout |
vehicle roundabout vehicle roundabout with just a small "painted" central island |
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highway=motorway_junction | exits on grade separated highways |
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highway=crossing | pedestrian crossing |
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railway=crossing | pedestrian crossing |
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railway=level_crossing | vehicle crossing |
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highway=stop | stop sign |
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highway=traffic_signals | vehicle traffic control |
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barrier=gate | vehicle or pedestrian barrier |
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barrier=stile | pedestrian way assist |
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barrier=cattle_grid | animal barrier |
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ford=yes highway=ford |
vehicle or pedestrian use |
Roundabouts
- See also: Tag:junction=roundabout
The sizes of roundabouts fit on a continuum and various sources suggest different uses of mini-roundabout for different parts of this continuum. German Wikipedia has Mini roundabout for 18 to 25 metres diameter; Kleine (small) for 26 to 25 metres; Grosse (large) for over 40 metres. They note that large roundabouts have been built up to 700 metres in diameter. [[1]]. English language Wikipedia has a more liberal definition of mini-roundabout [[2]] "Mini-roundabouts can be a painted circle, a low dome, or often are small garden beds." A note is made of the slightly larger roundabout with a truck overrun, also under the heading of mini-roundabout. The English mini-roundabout is separately defined in the Highway Code, and has its own road sign.
Open Issues
(Please use the Talk page if you want to discuss open issues.)
- For most of the crossings, is it appropriate to make them linear? I expect it is when any two routes cross any other two routes (e.g. a separated road crossing a 2-track railroad line. But is the level_crossing then part of the rail, part of the road, or both?
- Can highway=ford be an area, i.e. are there fords large enough for that to be appropriate? see Talk:Tag:highway=ford for discussion on this.
- Should highway=stop and highway=traffic_signals be used to mark the intersection or where the physical stop sign/signal is? What about junctions where not all directions are signed/signaled?
- Most of these should probably be moved to the junction=* tag. Stile, gate, and cattle grid aren't really junctions, they're barriers, so they should probably have a barrier=* tag. See progress on this issue at barrier=* proposal
Proposals
- highway=junction: Proposal for mapping the extent of junctions and to reduce the number of needed relations
