[Tagging] Implied oneway tag for highway=*_link, wiki edits

[Paul Johnson]

Pieren wrote:

>> no, IMHO we shouldn't generally "imply" but tag explicitly, otherwise
>> consistency is at risk.
>>
>
> no, if we don't have defaults, we will have to populate 20, 30 or 50
> attributs on each highway in the future. Don't ask too much from
> volunteers.

I think it's asking more from volunteers to be psychic than it is to tag
explicitly.

>> yes, oneway=no is the default for all streets unless explicitly stated. Even
>> for motorways I wouldn't assume oneway=yes (it could still be that a
>> motorway is not yet mapped as dual carriage-way).
>>
>
> I still see one exception where oneway=yes is surely implied : in
> junction=roundabout.

I should probably point out that not all roundabouts are one-way.