[prmoustache]

That is the beauty of roundabouts, they work regardless of the time of day, and on some where there is a need for more regulation you can still add lights before the roundabout.

[ghaff]

The lights near me were to tame chaos at an existing intersection.

A big roundabout I use semi-regularly does indeed handle 4 busy roads coming together well at night even if it’s a nightmare at rush hour.