Dec 6th, 2016: Roundabouts

[Carruthers]

Originally Posted by glatt

Do the cars in the centermost ring have to stop at each of those long lines perpendicular to their path?

Yes, the rule at any roundabout is give way to traffic on your right i.e. vehicles already moving around the r'about.
When there is a gap move on to the roundabout and then either leave the system entirely or head for the next one in the sequence until your planned exit presents itself.
Generally speaking it works well although I have experienced moments when I thought that I would be doomed to haunt it for all eternity.