[ghaff]

I have a few intersections near me that desperately needed to have the lights added but only for busy times of day. At night it can take 5 minutes to get through a battery of lights even with virtually no traffic.

I suspect choosing not to flash them at night is some combination of people not really familiar with that system getting potentially confused and (these are somewhat complex intersections) others just getting careless rather than carefully checking, at night, all the directions that traffic could be coming from.

[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.