[Tagging] Link roads between different highways type

djakk djakk djakk.djakk at gmail.com
Thu Jan 17 12:37:05 UTC 2019

Hello !

I think there should be both pieces of information ! A tag to indicate the
main road typology and a tag to indicate the link road typology (basically
the lower class of the interchange but it can be something else in case of
spaghetti junctions).
And let renderers decide which feature they want to use (probably both).

Julien « djakk »

Le mer. 16 janv. 2019 à 14:23, Paul Allen <pla16021 at gmail.com> a écrit :

> On Wed, 16 Jan 2019 at 13:07, Martin Koppenhoefer <dieterdreist at gmail.com>
> wrote:
> I would argue for motorway links (and trunk links according to the "German
>> trunk interpretation") it is already like this, and for all the other links
>> it could be the other way round. Maybe the rule should be something like
>> the link is the same class than the road it _belongs_ to (and this is to be
>> decided by the mapper, e.g. based on context, road typology, shape, ...).
>> In practise it seems it is done like this.
> I would say the rule ought to be that it should be mapped in accordance
> with local laws and
> regulations as to the nature of the link.  If that cannot be determined,
> then the mapper has to use
> best guest based on context, topology, shape, speed limit and other
> signage.  For UK motorways
> the regulations say motorway access roads are classed as motorways and the
> road signage
> confirms it.  That is not necessarily the case for links other than to
> motorways, and possibly not
> even for all of those (there are always exceptions).
> I suspect the wiki entry was written in days of yore when a question arose
> about motorway
> access roads and it became enshrined as a general rule for all link roads
> of all types in all
> countries.  Whatever the origin, I think it is time to amend it to
> something more sensible.
> --
> Paul
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