We do have one in the neighbourhood. Remarkably the road was so wide, that a 2 way separated bike lane was installed also. This is normally a quiet area and gets peak rush hr. traffic during work days.

Just wondering if you went onto youtube and searched for Dan Burden, a consultant on traffic calming...he's done a lot of charettes with local U.S. communities. See if there's something there.

The big question is....why not put a bike lane if the road is wide enough anyway and it makes sense.. Not all roads are eligible for bike lanes.

If your community is in the south with less/no snow, then traffic calming circles may work in wide quieter residential street junctions where neighbourhoods truly want safety.