[Tagging] New proposal: Obligatory tagging of oneway on motorway_link

Joachim noreply at freedom-x.de
Sun Oct 4 13:36:44 UTC 2015


2015-09-13 23:38 GMT+02:00 Paul Norman <penorman at mac.com>:
> On 9/10/2015 5:20 AM, Joachim wrote:
>>
>> Define on the wiki page of highway=motorway_link that oneway=* must
>> also be tagged for every motorway_link. If not tagged, the oneway=*
>> status of this way is undefined.
>
> Explicitly tagging oneway on links is preferable for obvious reasons, but
> you need to be careful with must, which is wrong for two reasons.
>
> - The wiki can document, but not set out requirements, as people can ignore
> the current state of the wiki.
> - Your next sentence discusses the lack of oneway
> - There is not a concept of formal validity, so must doesn't apply
> - Data consumers will make their own decisions

Your concerns are valid and I changed the tone of the proposal with a
rename from "obligatory oneway" to "no default oneway". I know the the
meaning of "MUST" from IETF RfCs, but "SHOULD" would be more
appropriate here.

The first sentence about the proposal is now: "Strongly recommend
explicit tagging of oneway=* on highway=motorway_link." "

I also put this sentence in:
"The goal of this proposal is removing the implied oneway=yes on
highway=motorway_link from documentation. The following implied
default oneway=no is also undesireable and could lead to dangerous
situations in navigations. "

The statement about the routing was already changed, so I will put
this on for voting soon if no other objections are coming.

http://wiki.openstreetmap.org/wiki/Proposed_features/Motorway_link_no_default_oneway

Regards, Joachim



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