It is still just a roundabout. Coming from any direction you can exit on any direction moving in circular fashion. Current mapping was still made with POI editor so has a lot of routing errors. You have to fix those or I will fix it my way: revert it to correct state. And also note, that other Lithianian mappers will also remove such mapping when they find it as it does not conform to Lithuanian mapping rules.

It is still a circle.. You still go in circle and leave the circle on first, second or third exit. Lanes are not mappable by separate vectors. Especially on such a tiny roundabout. In principle it is exactly the same type of roundabout as the "new type" roundabouts in Vilnius, which are much larger and still are not mapped with separate ways for lanes.

This is just a roundabout. It is now (and it was) mapped as a roundabout (I adjusted size/position according to latest changes).
And yes, you're correct, lanes do not have to be mapped as separate ways in OpenStreetMap.
I do not know what iD shows as error or warning as I would not suggest anyone using this editor. In my opinion iD is meant to simple things: add new POI's and change names of existing ones.

1. Lanes should not be mapped as separate ways.
2. Ways must form a correct (non intersecting) routing graph.
3. Using POI editor (iD) is incapable of creating data of even medium complexity.

Point 1 was a deciding one for revert, reinforced by the fact that there were numerous new routing errors created.

Jokių problemų. Sėkmės!

maps.lt yra uždaras žemėlapis, iš jo negalima kelti duomenų į OpenStreetMap.

You're getting the idea. And it is not specific to Lithuania. General idea in GIS/Cartography/design: essential thing is data hierarchy as well as visual hierarchy.

This particular way could be used to get access to the river (to say put in/out kayaks) as that is before residential/private area. It can also be used to go through the residential area to some kind of small shelter/shed/whatever (way/411023632). And it is also used for access and as alternative (non official) part of hiking route (Akmenos pažintinis takas), see the relief there: https://topo.openmap.lt/#t/15/55.39351/22.23773/0/0/.
So it is too important for orienting to be downgraded to service. Without this track it is not obvious how to get to the residential zone - so it is also important topologically.

highway=service is usually short. So basically ways we can forget if we have a map with a scale of 1:25000 or more. They do not help in general routing or general orienting in the field.

Difference between good track and bad residential is blurry, both are important for both routing and orienting. But the way discussed in this changeset (230684594) is nowhere close to being a residential - narrow, no name, no local municipality caring (levelling, surface hardening, snow removal etc.), ground/grass surface, leads to only one-two addresses, very low traffic.

highway=service is a final approach to something. Service roads are not essential for routing network, they can easily be dropped from medium scales (as is done even in OSM-Carto).

Way wide enough for two vehicles to pass one another without getting of the way is above track (residential/unclassified). Unclassified is higher than residential and should create it's own higher level graph (maybe google translate will be able to translate this: https://blog.openmap.lt/2017/12/09/keliu-hierarchija/)

Paved narrow way is track+grade1 (this is something new, 10 years ago all tracks were unpaved...).

From your example ways:
1st one is a road leading to nowhere (could be "agricultural"
2nd road leads to natural monunument - a tree in a forest
3rd is agricultural
4th are forest roads which are used for forestry but most of the time are used by people to get to the forest for different leisure activities. Absolutely the same type of roads would be used in national park forest roads.

In practice forestry tracks are much larger/wider as they need huge forestry vehicles to pass, they are very clearly visible from ortophoto. As opposed to smaller "personal/leisure" use tracks in the forest as the ones here:
osm.org/#map=16/55.0562/25.6032 (and here twice as many actual tracks should be mapped)

The point I'm making is that in Lithuania, Latvia, Estonia, Belarus, Ukraine there is no distinction of agricultural/forestry roads, all of them are accessible and are used by general public. Such information on a map conveys no useful message. Useful message is the road network and usefulness of each separate segment of it.

No problem with English language here.
1. If such a small residential area would cause a requirement of residential or even unclassified road it would mean changing 99% of track roads in Lithuania (as well as Latvia, Estonia, Belarus, Ukraine etc.).
2. Such a drastic reduction of track roads in favour of residential/unclassified roads would make a distribution of road classed totally unbalanced and irrational - thus unusable.
3. Unusable data distribution and hierarchy would make data impossible to be used in cartographically sound maps.
4. Disbalanced/unusable data hierarchy would make it impossible to meet the essence of cartography - convey a message in easy understandable and elegant way.
5. Current schema used in Lithuania is based on more than ten years of experience (both mine as well as fellow Lithuanian mappers) and millions of objects changed on our behalf. It is also well aligned with such giants of cartography as SwissTopo (check our attempt to create something like SwissTopo: https://topo.openmap.lt).
6. Current Lithuanian schema is totally aligned with professional members of Lithuanian Fellowship of Cartographers.
7. Wiki has always been and will always be just a rough guideline, not a rule. It is very subjective and uses non GIS/Cartography aligned criteria.

Grąžinau teisingą kūdros reikšmę landuse=basin, iD redaktoriaus siūlymų „taisyti“ nereikia klausyti.

Bet klausimas kodėl nuimta shop=convenience nuo Viados degalinės? Ar ten dabar tik kurą galima piltis ir nebegalima nusipirkti įvairių smulkių dalykų: užkandžių, gėrimų ir pan.?

Atšauktas neteisingas adreso keitimas.

Šaligatviai nežymimi atskirais vektoriais, jei jie nuo pagrindinio kelio nėra atskirti fiziniu barjeru. Ir tuo labiau negalima tiesiog numesti pėsčiųjų takų, jie turi būti tvarkingai prijungti prie bendro kelių grafo (t.y. atitinkamai sutvarkyti susikirtimai su kitais keliais).

Grąžinau įvažiavimams service=driveway žymas, nes tai labai labai nežymūs įvažiavimai.
Taip pat grąžinau noexit=yes žymą, nes ji nurodo, kad tas metras įvažiavimo nėra klaida ir kelias neturi ryšio su už metro esančiu kitu kelių metrų įvažiavimu.

Geras, jėga!
Puiki ir labai naudinga informacija žemėlapiui, nes tokie dalykai ortofotografijose nelabai matosi.

Supratau, ačiū už info. Papildžiau trūkstamas pėsčiųjų jungtis, kad maršrutizavimas veiktų.
Sėkmės!

Kadangi keistai nuskambėjo komentaras „suprojektavau“, tai pasitikslinsiu: tos požeminės perėjos po geležinkeliu realybėje yra?

Atšauktas pakeitimas. Kūdra žymima landuse=basin.

Atstačiau teisingą kūdros žymėjimą landuse=basin.