I am running into these more and more....

Example:

I've read up on them
https://en.wikipedia.org/wiki/Diverg...nd_interchange
http://www.divergingdiamond.com/
but I still don't quite get it.

The ones I've driven through lately seem to me to be slower than usual (from drivers -- like me? -- slowing down because it seems so very odd and even scary) and it appears there is no possibility that the crossing street under/over can ever NOT have a red light.

Are these really safer? Are there folks who like them? Enlighten me