Did you hear Francois Thomazeau’s theory on the abundance of roundabouts in France on the Cycling Podcast? It’s a good way for the mayors of French towns to get bribes, the more roundabouts the more corrupt the mayor is.
A friend of mine told me that cities used to get EU funding for creating roundabouts. She was from Borlänge in Sweden where they have shitloads just to get as much monies from the EU as possible. Best one I found was a painted circle in the middle of a regular four way crossing.
Here it is