@Con-Hennekens
@Nick-Carthew
I have checked now several of my routes which were totally messed up when using the HERE map and I have to say I am happy again because it seems the seasonal closure function is the only reason for all the mess.
I my opinion there is something wrong in general with this function because I had such issues as described above quite often with the here map and now having disabled this function no problem anymore.
Regarding the specific example above, I can assure you that that this road is not even closed, meaning this is not a full road closure and for sure not a seasonal one. I have also checked the official traffic information from the norwegian traffic department and there is nothing mentioned for this road with respect to closure etc. whihc means the road is open.
Based on this I would suggest to just forget about the seasonal closure function for the time being because without that everything seems to work. Maybe later the function will be improved but I can live without it. In nOrway we have seasonal closures for mountain roads etc so its much more reliable to check for those the official norwegian sources I think.