France is not littered with 'Priority to the right' junctions. Similarly, it is a very pale shadow of the law as it used to exist, so no need for Bruxelles to become involved, despite the protestations of people in Bracknell, Berks.
Don't ride about as if every Pascal or Amie are out to sideswipe you or (more accurately) you them. If the junction looks odd, just as it does in the third picture of the blog, then proceed carefully.... Just as you should do for any potential road hazard, particularly those that just don't feel or look right. There is enough road signage in the picture to show that it's a road junction of some kind, so you probably should be on alert, irrespective. Not least as it's no great benefit being both droite AND dead.
Do the locals know that they are there? Yes, of course they do, just as I know that there is a mini-roundabout with an altered priority in Bethnal Green, put in to slow traffic down. Will they steam in? Probably yes; they do in east London, they will in St Perdue sur Lost, too.
Stolzy's advice is probably best:
... just an assumption that any junction without paint on the road and a give way or stop sign is a priorite a droite. Don't rely on signs to identify them.
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In short: If it looks odd, it probably is odd. If it turns out that it was normal after all, it matters not.
Marry that in to the increasing (though by no means uniform) use of 30 kph (roughly 18 mph) limits in some villages, chicanes and speed bumps that are now appearing, should send you a signal that it's probably best to WATCH OUT for a bit.
