I live near a fairly busy (~3,000 vehicles/day) intersection that is controlled with a yield sign, which is itself a very unusual feature for this area.
This enables me to spend as much time as I wish observing how people use it.
Some people get it right. Many get it wrong -- either treating it like a stop sign (it isn't), or treating it as a Just Go sign (it isn't).
However, what's perhaps actually-interesting is that I've not noticed any wrecks there -- ever. So however it does or does not work, it seems to at least be "safe."
