[Tagging] lanes = 0

Jérôme Seigneuret jerome.seigneuret at gmail.com
Tue Jul 30 14:00:43 UTC 2019

@martin this is a problem on what is accepted as a 1 lane because if you
are on a path there is also 1 lane but accepted size is less than what?

highway type need have a base width to appreciate or range values If you
have 1 or more lanes. This case is for normal gabarit what about motorcycle
| car or car | truck.

This is the problem we need defined if there is no marked. width can help
to appreciete that situation but by default there is 1 lane forword and 1
lane backward.
What is the base frame to define lanes in a model? car? truck? motorcycle?
specifics width?

Le mar. 30 juil. 2019 à 15:34, Martin Koppenhoefer <dieterdreist at gmail.com>
a écrit :

> Am Di., 30. Juli 2019 um 14:05 Uhr schrieb Jérôme Seigneuret <
> jerome.seigneuret at gmail.com>:
>> if lanes is about the total amount of marked "2-tracked-vehicle"-lanes
>> (as it is according to my understanding), then lanes=0 means no marked
>> lanes.
>> No simply because 2 lanes = opposites 1 forward 1 backward marked or not.
>> This a routing comportement.
> maybe you just can't assume in your router that the OSM tag lanes
> describes what you expect for lanes?
>> You can have 2 lanes but no mark on road. This is the case in rural
>> France road. Legaly,  absence of marking is permit and you need fix right
>> position on road.
> Sorry for being ambiguous, I was referring to the wiki definition of the
> tag lanes. I agree that there can be lanes without lane markings,
> observable lanes. I have to deal with the same situation in Italy.
> Basically what I am doing is adding lanes=2 if there are 2 lanes, even if
> they are not marked. ;-)
> Interestingly, one of those roads I was thinking of, just has gotten (or
> renewed) lane markings. It may often be a maintenance question, markings
> being renewed in such long intervals, that there are years without markings
> but then they might eventually return.
> I'm even tempted sometimes to add lanes=1.5, although these cases are
> better described with a width.
> Cheers,
> Martin
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Jérôme Seigneuret
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