[Terr_]

Agreed, with the condition that there is only one lane.

Ones with multiple layers stress me out, there are more ways to screw up and more demands on your defensive-driving attention.

[8n4vidtmkvmk]

I think the problem is not that they're impossible to figure out but you have about 2 seconds from when you see the sign to when you're entering the double roundabout.

[labster]

That’s a very solvable problem of bad signage.

[googledocsftw]

Yes. If there are 2 it should be a "dog bone" with a long straight bit so you have time to adjust. Like:

     |            |
    =O============O=