Hello champs,
As the title says I’m looking for a page for special cases for the Roundabouts, because in Portugal we found one node that are 3 roundabouts into one:
We get many UR in that place.
I asked the champs in Portugal and no consensus was achieved so I suggested to look for in the international forums and wiki.
Can you champs help me? 
I don’t think so. I remember there being much discussion regarding roundabout naming when the “and then” instruction was introduced so that instructions for double roundabouts made sense (conclusion, don’t name the roundabout segments). But I think that was driven by the UK editors and I don’t know if there is any further guidance regarding other special cases.
The name can be removed, thats not the case here
For example you can make a Roundabout here:
https://www.waze.com/pt-PT/editor/?env=row&lon=-8.60803&lat=41.20070&layers=2021&zoom=6&segments=230028859,140757042,140756623,140755945,140756624,230028854,140747886&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0&update_requestsFilter=true&problemsFilter=false
sill half is normal the other half not.
but not here:
https://www.waze.com/pt-PT/editor/?env=row&lon=-8.60774&lat=41.19945&layers=2021&zoom=6&segments=140753411,140753412,140748360,140747885,140748361,140748357&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0&update_requestsFilter=true&problemsFilter=false
this one is intersecting the last roundabout.
the last one is normal roundabout