Our neighborhood has been discussing roundabouts since someone found that the city would allow them if the residents paid for them.
First, it would cost a fortune.
Second, though I wouldn't do it, it would give me a beautiful opportunity to put my Miata through her paces. And I'm sure there's people out there in pickups who would go for it.
My neighborhood also wants signs put up. Sorry but signage and roundabouts are something to be ignored or even challenged by people who want to be fast drivers.