I grew up in Canberra, known as the roundabout capital of Australia [1] as well as being the actual capital of Australia. It has a population of ~350,000, 406 r

I grew up in Canberra, known as the roundabout capital of Australia [1] as well as being the actual capital of Australia. It has a population of ~350,000, 406 roundabouts and 276 traffic lights. In my experience they keep traffic moving really well, as long as the traffic load into each entrance is roughly equal - otherwise it's hard to enter the roundabout from a lesser used entrance. They take up more space than traffic lights in most situations, however Canberra is a planned suburbia so that wasn't an issue there. [1]: http://www.abc.net.au/news/specials/curious-canberra/2016-12-05/is-canberra-the-roundabout-capital-of-australia/8075412 http://www.abc.net.au/news/specials/curious-canberra/2016-12...