Really not needed in a route going back and forth between A and B.

Vinstra is not a city. A town at best. Cities in are normally 100k people. In Norway this is 50k with exceptions of Tromsø, Bodø, Kristiansand.
Please do not mistake the city status some places have given themselves after 1996 as the same. Places with less than 1000 people have city status.

Please do not edit with Bing in Norway unless you know what you're doing.
House number nodes should never be moved, these are imported from the Norwegian Mapping Authority and have high quality position. They can actually be of great help to see if Bing is bad.

Flott! Då er den grei. Om du bur i området så kan du kanskje sjekke 312 mellom Granrudmoen og Tretten også?
Ser ut til at SVV går bort frå det normale her. Normalt sett har vegklasse 2 og 3 vore skilta, men no ser det ut til at dei også skiltar 4. Får ta dette opp i epost lista. Vi må kanskje gå over til å bruke funksjonell vegklasse frå SVV.

That's down between fv213 and the "new" connection to E6 and fv255 south of Storhove. If you haven't visually verified signs north of this yourself then please do not alter class.
NVDB list no signs outside this roundabout: way/241573731

So they have actually signposted this road with the white number signs?

Tunnelen er ikkje åpna!

Kan legge til at litt av grunnen er at vi setter "class" til vegeigar. Fylkesvegar kan og vere motortrafikkveg og kan jo då ikkje taggas som motorveg. Men som "primary/secondary" + motorroad=yes

Veit ikkje kven som har lagt motortrafikkveg inn der, men det er feil. Teknisk sett så er faktisk "trunk" i OSM det samme som motortrafikkveg her i Norge, men sidan vi brukar den på alle riks- og europavegar, så blir det feil. Vi brukar motorroad=yes på motortrafikkveg.

Ver snill å reversere dette.

Please don't alter roads that have already been improved with data from Kartverket and/or NVDB. Unless you use an industrial grade GPS, or the road have changed significantly, data from Kartverket will always be better quality.

Vaskehallen er ikkje teikna inn på kartet. Det du markerte som vaskehall her faktisk taket på truck diesel pumpene :)

Did they actually close this before completing the new temporary ramp?
There is no mention of this on the projects Facebook page.

Short constructions like this do not really warrant a map edit. There will be a lot of tunnels closed at different times due to maintenance.

The access=no tag is a blanket one that will not allow anything. Should never be used unless completely closed. Simply use foot=no and bicycle=no

Is the tunnel closed? Can't find any info about that at http://www.vegvesen.no/trafikkbeta?lat=59.28118&long=10.42620&zoom=12

Du har laga alt for komplisert kryss mellom rv3 rampar og fv215/601. Heilt unødvedig og kan lage rare problem for ruting software.
Skal heller ikkje vere eigen "way" for avkøyringsfelt (Haugedalsveien mot rv3) i OSM. Bruk heller turn:lanes=

Never replace existing roads unless you have local knowledge of the road and know that what is there is wrong ;)

I had that intersection perfectly mapped out before you replaced it with Elveg :)

Intersection for fv410 and 420 needs a lot of fixing. Do not use separate ways for lanes at intersections and crossing ways over another like this.
Use turn lanes and turn restrictions.
Only lanes physically divded by kerbs or similar should have separate ways.

Please use english description.

From google translate I see you used BIng to map this? I would advice against using Bing in Norway unless you have very good reference gps points or local knowledge. The Bing aerials are often very poorly georectified in Norway.