[eesmith]

Here's a rotary in Boston (Sullivan Square) with a traffic light - https://www.google.com/maps/@42.3840002,-71.0744129,3a,75y,9... .

Here's a roundabout in Cape Town (Adderley Street Fountain) with a traffic light - https://www.google.com/maps/@-33.9202591,18.4250697,3a,75y,4... .

Here's one in Cambridge, UK - https://www.google.com/maps/@52.2084812,0.136931,3a,75y,82h,... .

[LoSboccacc]

One in Milan https://www.google.it/maps/@45.480752,9.2227599,3a,75y,111.4...

there are a load there with lights, tram crossing it straight, pedestrian crossing that aren't on a road crossing etc. makes for some fun time crossing one at peak hour, it's not weird at that time to get stuck in one for 10 minutes or more.

[HarryHirsch]

You find that model in areas which in peaktime see too much traffic for a roundabout to work well. If traffic along one pair of roads is too heavy anyone on the minor roads can't get in. So the light serves to gate the heaviest traffic. During off-peak hours the light is off.

[gowld]

The first 2 are lights near the roundabout (where streets cross, or at pedestrian crossings), not in at the roundabout.

[eesmith]

Okay, next roundabout over in Cape Town, no crossing street, no pedestrian crossing - https://www.google.com/maps/@-33.9172315,18.4285489,3a,75y,1... .