[fransje26]

> Slowing down is important though, as it give drivers time to think and react. Whether they choose to use that time correctly is a problem, but hopefully some or all of the other drivers can use patience and avoid an accident.

I fully agree, and I also think that the "original" roundabout design serves that purpose well, although throughput might different than with dynamic traffic lights.

The point I was trying to make was that slowing down traffic through added complexity could be a dangerous approach to take. It's a switch from a low cognitive load approach by simple design -slow down to a stop/almost stop, look to one side, give way if necessary-, to a slow down of higher cognitive load -slow down, figure out how to navigate a more complex (new) intersection, and maybe remember to give way-. So where in the first approach cognitive load is used to assess how to give way, in the second approach some of that load is used to deal with a more complex/unfamiliar situation. And for some users, I argue, that could already push them more towards accident territory as less cognitive capacity is available to properly assess the traffic situation. Sometimes less is more.