This may seem a silly question - but, what roundabout? I can't see one on that picture, let alone two!? Just a fantasy, possibly CGI of what a brain-addled village idiot may envision when high.
I accept that they may be out of picture, but I can't see any warning or informational signage for a roundabout either.
I don't know what the designers had in mind but as I see it, it can be driven as a junction or a roundabout because the painted lines are saying don't enter unless it is empty, and give way to traffic from your right.
Following those rules there should only ever be one vehicle at a time in the coloured area.
Looking at the picture in, the upper sort of roundabout (R/A), the grey car has jumped the gun, he may be signalling right or one backlight has failed but if it intends to leave on the upper right he just passes behind the van, and the black car has to give way (traffic from the right) if he intends to go straight on, fine.
Black car, is held until grey and white van clear the upper R/A.
The white van should not enter the lower R/A but he can move to the next lines at the entrance to the lower R/A then wait until the dark grey car in the lower R/A has cleared but if it intends to leave into the lower right road, OK but if it wants to leave lower left road then he has to wait for dark grey or until white van can pass behind it.
In the lower R/A, dark grey is stuck if it intends to go up to the upper R/A because the white car cannot move until light grey clears the upper R/A.
Red car, is waiting for dark grey to clear, (lower R/A) if red wants to turn left into lower left road then he can wait until dark grey has moved into the lower R/A far enough for him to turn left behind dark grey, as though he was on a normal round about or a simple road junction.
If red car wants to get onto the upper RA he has to wait until grey (upper RA) moves letting white cross the pedestrian area, when dark grey is able to vacate first half of pedestrian area then red is safe to move onto lower R/A.
A car in left lower road wanting to turn right uses the lower R/A area similar to a R/A but only if it is safe to do so, as the picture is at the moment, he could pass dark grey in front so the pass each other nearside to nearside (which is what R/A forces you to do).
Once dark grey has cleared then red would go next under the give way to the right rule.
Whew, I hope I haven't mixed the vehicles up!
