Here in the U.S. they call these Traffic Circles, Roundabouts, or Rotarys, depending on where you live. What to you call them in Belgium? France?
Image Source: Google Maps
P.S. I just got off the phone with Amazon. I got an English guy (named Ace) in South Africa. I jabbered with 'em about a bunch of stuff. They speak a lot of German there, which was news to me (like most everything, since I don't know squat). He said it had reached 47ºC (~117ºF) earlier and it's predicted to be more of the same for a while. 40-60% humidity, too. That's f**kin' hot!