[Tagging] lanes = 0

Warin 61sundowner at gmail.com
Fri Jun 14 23:50:47 UTC 2019

+1 with Joseph

OSM is world wide. What is suitable in one place may not work in another.

The use of the tags should follow local customs, the presence of lanes should be judged by local customs,

in Australia they are legally required to be marked for multi lane roads, a road with a lane in each direction does not require markings.

Elsewhere in the world they not be marked but used as multiple lanes.

Tagging the presence/absence of lane markings looks to be a requirement for some.

It could be done as a country wide default, this could ease concerns of some.

I have seen one instance of lane=0 to mean that the 'road' is not wide enough for one lane...
lane=0 is undocumented and has been taken to mean different things by different people.

To me, lane=0 has no true meaning and indicates a problem.

On 15/06/19 09:10, Joseph Eisenberg wrote:
> This requirement is fine for Europe, but the presence of lane markings
> is not reliable in all of the world.
> In developing countries, such as here in Indonesia, the presence of
> painted lane markings is inconsistent. Often cheap pain is used
> instead of more durable thermoplastic, so the markings only last a
> year. After that the road still functions the same, even though the
> markings are no longer visible.
> There are also sections of primary or trunk road that are at least 6
> or 7 meters wide and freshly painted, but have not yet been marked and
> may not be for a number of years. I tag these as lanes=2 because the
> road is clearly wide enough for two lanes.
> And here in town the main road was recently marked with 2 lanes in
> each direction, but before it already functioned as 4 lanes because
> the width was sufficient.
> While tagging the width is useful, I believe tagging the presence of
> "de facto" lanes is reasonable in developing countries and places
> where painted lane markings are not frequently used.
> On 6/15/19, Allroads <allroadsworld at gmail.com> wrote:
>> First, the consensus in OSM is, that only the tag key  lanes=* is used, when
>> there is are visual markings for lanes.
>> Then the question is, are there lanes? Yes or no. How many?
>> lane_marking= no, we agreed (OSM), when no visual lanes there are no lanes,
>> lane_marking, it is referring to lanes, that are not there, so useless tag.
>> If lanes=no is not right, lanes=0 zero means, that there are no lanes, zero
>> is nothing.
>> I tagged a few , as you named two way road with no lane marking lanes=1,
>> they told me that is wrong, I agree, it have no
>> lanes/rijstroken/fahrstreifen, retagged them.
>> Width tag is way to go. For roads without lanes.
>> Estimation is difficult, maybe one day Mapillary can measure the width of
>> the road.
>> In JOSM you can measure the width of a road, drag a line and see width.
>> Some countries, Goverment produce open data, look or agree with them if you
>> can use it in OSM. (lisence)
>> Here a third party, https://bgtviewer.nl/ visualise the data. We can use it.
>> To realign roads.
>> (A lot of the data is measured in, correct) We can not do better ;-).
>> Wider use of  lanes. We can not do that.
>> Just read all the dictionaries, wikipedia, etc. according to lanes, it is
>> always lanes/rijstrook/fahrstreifen (images with markings)
>> First these must be rewritten, global accepted. This is not happening.
>> So OSM stays, lanes are a part of a road with markings.
>> lanes= is used for lanes, when there are no lanes, there should me a
>> possibility to give a tag, lanes= is used, either it is lanes=no or
>> lanes=0.
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