[Tagging] lanes = 0

Joseph Eisenberg joseph.eisenberg at gmail.com
Fri Jun 14 23:10:36 UTC 2019

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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