I've seen quite a few roundabout projects over the years that seemed to work out well... Although I really detest any that have multiple concentric lanes.

There are multiple well-researched and practical interventions that can be done to make driving safer for drivers, pedestrians, and cyclists. Implementation in the US is regularly scuttled by insane self-styled experts who "audacity" their way to public trust and influence, inexplicably.

https://en.wikipedia.org/wiki/John_Forester_(cyclist)