I can understand that - but my concern is how does the person coming from the left and planning on going straight (in your diagram) know that the person from the bottom is not going to stop if he is planning on making a right? You see the back of an octagonal sign pointed in their direction. I guess you have to look for the little rectangle one as well. Just saying... There was a time I was unaware of this kind oif set-up.
Locals know the situation... but pity the guy just passing through. There ought to be a warning - but how do you word it? Traffic from the right may/may not stop... might/might not have the right of way?
That's pretty much an issue with all traffic laws: the states create their own.
So, in Washington DC and a few other places, traffic inside a traffic circle yields to traffic entering, while nearly everywhere else it's the opposite.
Around here, we have streets where the left turn lane in one direction and the right turn lane in the opposite both get green arrows to turn onto a two lane street. While in theory
, both can turn into their proper lanes and go on their merry way. Unfortunately, 1) one of those lanes eventually becomes right turn only and 2) most people assume an arrow means you are the only one allowed to make that turn. Guess how often people get cut off?
Up near the local hospital, they didn't bother with left turn arrows. Instead, each of the 4 points of the intersection (which all line up, by the way) get released separately. If you're local, you know you can just make your left on a regular green because opposing traffic has a red light. If you're not (and perhaps desperate to get to the hospital) you might find yourself sitting there waiting for oncoming traffic while the people behind you are getting ticked off at you.
It's funny how the feds constantly want to interject themselves into our lives on silly stuff, but things like driving is left up to the individual states so we can all meet up in fiery crashes at the borders when someone isn't used to yielding where they come from.