This discussion here can essentially be broken down into two parts:
- Is the German part of the roundabout urban or rural?
- Is the German part of the roundabout fall under Dutch RVV jurisdiction or German StVO jurisdiction?
Regarding 1, The Dutch part of the roundabout and the connecting Dutch road northbound are part of the urban area of Heerlen (these were previously incorrectly mapped as rural). Considering that
- there are no signs indicating that you enter/exit this urban area within the roundabout,
- that there are no road connections further into rural Germany, and
- people therefore experience the entire roundabout as urban,
I decided to change the entire roundabout to urban and accordingly set the speed limit to 50 km/h.
Regarding 2, the road traffic regulations are determined solely by the location of the road with respect to national borders, unless there is an international treaty that says otherwise.
This would be very relevant information! But as far as I am aware, the Netherlands is subject to only two such treaties, both with Belgium:
- the bridge between the Belgian N761 and the Dutch N296 near Maaseik;
- the bridge between the Belgian E314 and the Dutch A76 near Stein.
In both these cases there is a part of the bridge that lies inside the Netherlands but falls under Belgian jurisdiction. (This is a consequence of the national border still being unclear when the treaties for these bridges were signed.)
For comparison, the ring road of Baarle passes through several Belgian enclaves, without such a treaty. These sections have no intersections, no adjacent properties, no signed border crossings and the road is operated by the Dutch government. Nevertheless, Belgian traffic rules apply instead of Dutch RVV, as is evident from the specific provision in the municipal traffic regulation of Baarle-Hertog setting the speed limit in these sections to 80 km/h (contrary to the Flemish regional default of 70 km/h).
While the Dutch-German border treaty grants the Dutch some rights to travel from the Netherlands to the Netherlands across German territory, this right is limited to specific routes nowhere near this roundabout, and almost all German traffic rules still apply to such transit traffic (except some specific rules explicitly mentioned in the treaty, i.e. rules regarding vehicle dimensions and Sonntagsfahrverbot).
I can confirm this is not the case. ![:slight_smile: :slight_smile:](https://community-cdn.openstreetmap.org/images/emoji/twitter/slight_smile.png?v=12)
Then you will crash before you even reach the German section. ![:slight_smile: :slight_smile:](https://community-cdn.openstreetmap.org/images/emoji/twitter/slight_smile.png?v=12)