Roundabouts are a lost cause
In Nantes, France, they are well known for doing absolutely strange things with roundabouts.
They have especially invented the "double-roundabout", where while turning around the first-one, you have to stop and wait to enter a second one to continue...

There are several like this, during rush hour, it is not easy to describe the directions even by a human so not easy with a GPS.

They have even done better : put a car park entrance in the middle of the roundabout:


There is a (french) blog post about this, where they joke about all stupid version of roundabouts they have : the 500meters long nascar like one, the square roundabout, the double, and even in the middle of cemetery...
https://inconvenantes.wordpress.com/...ints-a-nantes/