Unsignalised roundabouts provide a safe and efficient form of intersection control.
See the downloads page for discussion papers and an Excel application for roundabout analysis. You can calculate annual sums of variables such as operating cost, fuel consumption, carbon dioxide, other pollutant emissions, total person delay, stops and so on. This enables you to demonstrate benefits of alternative intersection treatments and improvements to existing intersection conditions in a more powerful way. The Australian methods are most comparable with HCM methods, and are implemented in software that is most compatible with the computational structure that has been developed in Florida for comparing other control modes. Its user interface is graphics based, and is very well documented and user-friendly.