[GraphHopper] Which tags influence the routing?

[Peter]

> Okay, I understand. (I suppose that "truck limitations" means all
> these tags listed at
> http://wiki.openstreetmap.org/wiki/DE:Maxheight_Map like maxweight,
> maxwidth and so on.)

yes

>
> One more question which is a little bit specific to Ivory Coast: Here,
> most roads are very bad. While in residential zones, maxspeed=60 is
> correct because this is the traffic roule, in reality you often can't
> go faster than 5 or 10 km/h because the ground is so bad. Is there any
> tagging (beyond maxspeed) that reflects this?

Yes, use track=grade1 (greater grade is currently even completely
excluded for car) or a bad surface like ground, grass, dirt, ...

(or a different highway type)

Regards,
Peter.


>
> Lukas Sommer
>
>
> 2014-06-17 8:56 GMT+00:00 graphhopper <graphhopper at gmx.de
> <mailto:graphhopper at gmx.de>>:
>
>     Hello Lukas,
>
>>     Thanks for the very fast response!
>>
>>         > (and so useful that it makes sense to add them to OSM).
>>
>>         What do you mean here?
>>
>>
>>     It's just that I was wondering which of these tags is worth to do
>>     all the work to add it to OSM when I map streets -- and which
>>     isn't so important because it doesn't influence the routing.
>
>     Ah, ok I see. So let me reformulate my answer a bit to make it
>     more clear for other mappers as well.
>
>     I think the most important thing is to add addresses especially in
>     countries != Germany! Of course this has nothing to do with
>     routing but we really need address search like pelias or
>     photon/nominatim for routing.
>
>     Besides addresses, I think indeed turn restrictions and truck
>     limitations are the information which often absent. (But both of
>     them are currently not taken into account from GH but will be this
>     year probably.) Maxspeed is another candidate and last but not
>     least there are many problems with oneways. I think they cannot be
>     blind alleys but often they are. See the last discussion about
>     'not found' or this here:
>     http://graphhopper-read-only-archive.1087335.n5.nabble.com/Issues-detecting-driving-paths-along-one-way-streets-td1002.html#a1003
>
>     I can easily create a script for this issue to find out all nodes
>     and ways with this problems world wide, if there is interest.
>
>     Regards,
>     Peter.
>

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