Following the news of this visualization of roundabouts, some folks in Spain noticed that there are a lot of physical roundabouts missing the 'junction=roundabout' tag.
Obviously there are a lot of circular ways which are not roundabout but traffic circles instead - the difference being in the right-of-way when driving inside the circular way.
Detecting circular loops of road shouldn't be too difficult. From there, users should tag the circular loop as either roundabout, traffic circle, or throughabout. There is an [old proposal](for those), which might be useful to bring back to life.
Following the news of this visualization of roundabouts, some folks in Spain noticed that there are a lot of physical roundabouts missing the 'junction=roundabout' tag.
Obviously there are a lot of circular ways which are not roundabout but traffic circles instead - the difference being in the right-of-way when driving inside the circular way.
Detecting circular loops of road shouldn't be too difficult. From there, users should tag the circular loop as either roundabout, traffic circle, or throughabout. There is an [old proposal](for those), which might be useful to bring back to life.