[OSM-talk] [tagging] Feature Proposal - RFC - (PSV_directions)

[Charlie Echo]

On the one side, I agree that tagging should be more ellaborate.
On the other side, I just imagine few exceptions, and few categories of vehicles. For instance, in France, when I write "psv", I mean "buses, cabs, bicycles", because they are all allowed on the same way, and everyone knows it. In fact, for the vast majority of ways, everyone is allowed. So we may tolerate tricky tagging for tricky events.


>So we might start thinking about this once before quickly patching 
>current problems with tags like psv_directions :-)
I suppose when we have defined a new tagging reference, a small script will be run on the database to modify automatically all ways, and to raise flags if there is a need of manual intervention, which should be rare.
(such a script should be run to replace the value "1" or "true" by "yes" when relevant, and so on...)

My point is to add information in the system in a structured way, even if too complex.
As the need of taging this "opposite bus lane" is quite frequent where I live (Paris, France), I MUST find a solution quickly. My current best approach is to create two ways, one for cars one-way, and the other two-way for buses. It's stupid, and splitting one way in two is a nonsense that will be hard to modify back, so I really want to have it fixed!

Cheers,

----- Mail Original -----
De: "Ben Laenen" <benlaenen at gmail.com>
À: talk at openstreetmap.org
Cc: "Charlie Echo" <openstreetmap at coutiere.com>
Envoyé: Jeudi 26 Juin 2008 16:08:36 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne
Objet: Re: [OSM-talk] [tagging] Feature Proposal - RFC - (PSV_directions)

On Thursday 26 June 2008, Charlie Echo wrote:
> The proposal you mention is a radical change in the way we would tag.
> We would move from tag=value to tag:subtag:subtag=value.

Sure, it's very different to current tagging, but we need to think about 
more complex access restrictions.

The proposal isn't perfect either, one can't for example say that goods 
vehicles over 3.5 tons are not allowed except for loading and unloading 
(a restriction that appears a lot over here). The problem in that 
restriction being that it depends on more than one property: goods 
vehicles (buses are always allowed for example), maximum weight 3.5 
tons, and an exception for loading and unloading its goods in the area 
where the restriction applies.

Or what about restrictions applying one direction only, or restrictions 
applying to only one lane in a three lane road?

The ordering problems you mention is another thing. I also can see lots 
of ambiguity issues coming up.

Nevertheless, instead of adding new tags like psv_directions, and after 
that probably moped_directions, bus_directions, tram_directions, 
motorcycle_directions etc, we should think about a much better tagging 
scheme for this. The proposal I mentioned is a step towards something 
more powerful, but not quite there yet.

So we might start thinking about this once before quickly patching 
current problems with tags like psv_directions :-)

Greetings
Ben