[Tagging] Feature Proposal - RFC - Turn Lanes
zverik at textual.ru
Tue Oct 11 11:24:54 BST 2011
Martin Koppenhoefer wrote:
> I wonder if in this case:
> it would not be better to draw 2 ways (and add a relation to say that
> you could - against the traffic rules or maybe as a pedestrian -
> the street from one way to another?
Yes, my opinion is that all highways that are more that 4 lanes wide
should be drawn as two ways. Alas, it seems that most mappers recommend
drawing one way if there is no physical divider, even if there are 4
lanes in each direction.
> Otherwise there should be a way to indicate that you cannot use the
> opposite lanes (say for takeovers) because of the area in the middle
> of them (diagonal white markings).
There was a proposal for tagging type of divider, but it has been
abandoned for several years:
> How would you tag a lane according to this proposal that allows at
> same time e.g. to go straight and left?
Lanes separately are not tagged, only lane groups. In this case there
are one lane group for turning left and one — for going straight. So it
would be lanes=N, lanes:turnleft=1, lanes:through=N. If the left lane
was used _only_ for turning left, lanes:through tag could be omitted.
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