score:5
A Dutch citizen cannot possibly be refused entry to their own country; simple as that!
Austria has no entry restrictions at the internal Schengen border (e.g. from Germany/Hungary).
Germany allows entry for professionals on duty such as deliverers.
The obstacle will be Hungary, which refuses entry to all foreigners except EU/EFTA citizens residing there since at least 5 years.
However, you can apply for a waiver HERE (bottom option, then "COVID-02"). Anything you fill in must be in Hungarian, so use Google Translate if you don't speak it.
Upvote:6
First of all, thanks to Crazydre for his answer and guidance through this tedious procedure of obtaining a transit waiver. Until now I have not received a confirmation from the Hunagarian police and there are some financial consequences if I don't cancel the trip today. Sometimes this kind of requests take time, I get that.
I should have done this earlier. This morning I contacted the Hungarian consulate in Romania with the question if I can transit by car to the Netherlands. They have confirmed that a holder of a Dutch passport will be allowed passage to his home country. As a bonus, being the holder of a Romanian residence permit, I will also be allowed to transit back to Romania, when the time comes.
Meanwhile I also managed to trace down that "friend of a friend" that drove to Germany last week (Point 6 in question), and he also indicated "no problems at all".
So I'm just gonna go and see if this works.
If my way worked, I will update here and change the accepted answer.
Update: The waiver from the Hungarian came through just before I went on the way. I have presented the waiver at the border checkpoint, but the officer was not interested in it. So I'm not sure that tells me, if it was needed. I would recommend other travelers to do it regardless, with sufficient time in advance.
Another important note: The border of Nadlac/ Nagylak II (on the highway) is closed for personal cars. This is not very clearly indicated on the Romanian side and people receive little to no information at the checkpoint. Probably I missed a sign on the highway, but I can't confirm that. After some time I while I found out personal cars need to go to Nadlac I. That's the old border on the DN-7 (RO) / 43 (HU) road (maps location). Once there, border passage took 2 hours. All persons passing the border are temperature checked.
For the other borders: