Personally, I think they're bollox as they simply introduce confusion - no-one seems to know who has right-of-way, and either party can get quite peeved when the other doesn't give way! I don't think roads are the place to test out such ambiguity.
Speaking of crossings that are bollox...
I shake my head every time I have to negotiate this roundabout. The poor placement of pedestrian crossings at each roundabout exit (bar one) are an accident waiting to happen.
You could try this one in Hemel Hempstead, locally known as The Magic Roundabout! I had to drive around a number of times it when I was having lessons before taking my test. Also, on my test! It's quite confusing. At least it does not have pedestrians crossing where the cars are supposed to be at the same time though.
There's a similar roundabout with mini roundabouts near Heathrow, which must be shock for all those people from overseas picking up their rentals.
Yes, it must! Especially those from countries that drive on the wrong side of the road...!
I agree. Americans drive on the right side of the road..... :-)