The Arrive Alive site also has a really good illustration and animation showing you how to navigate a circle
The diagram above illustrates your everyday traffic circle, or roundabout as some may know it.
Contrary to popular belief, you may not drive wherever the hell you like on whatever side of the road you have chosen i.e. left or right. This diagram shows clearly which direction you may go, depending on which side of the road you are driving.
1. The yellow arrow indicators show you that there are only TWO (2) possible directions to take when on the left hand side of the road, or, outside lane.
2. The blue arrow indicators show that there are also TWO (2) possible directions to take when on the right hand side of the road, or, inside lane.
3. The red indicator arrows show when some idiot decides to take the road-law into his own hands, ending up in an accident, often resulting in an angry argument and possibly a restraining order for use of bad language and throwing punches.
You may be wondering where the blue indicator arrows go to from there? Well, my dears, the rules start all over again. They may go straight, or right again. It’s that simple.