...moving sideways in unpredictable directions...

There's nothing unpredicable about 'YIELD TO TRAFFIC ON THE ROUNDABOUT'.

Except for Americans of course.

They really simplify the road junction by reducing the number of possible interactions.

You only get two lanes (or directions) of traffic meeting whereas at a light you usually get three or more.


The problem that Autolycus mentions is very true, especially at rush hour, that's why some roundabouts have lights as well.

Cookieless bert.