I actually found the same map and am reading it differently.
From your link: “The states indicated in green dictate that the left lane should be used exclusively for passing or turning left”
There are 10 states in green. I wouldn’t call 10 of 50+ “most ALL”
For the 29 in yellow, you must only move from the left lane if you are driving slower than normal traffic. You can stay in the left lane for miles and miles and miles if you are moving faster than normal traffic. This is the “faster traffic to the left/slower traffic to the right” saying that I think we’ve all heard.
In Virginia (gray/brown on the map), there is no restriction against using the left lane if you are not passing, but you are obliged to move to the right if the car behind you gives a visual or audible signal (this is generally understood to mean flashing lights or honking horn). However, most drivers are unaware of this and you still get people camped out in the left lane going 10-15 MPH slower than surrounding traffic.
Is it illegal to wait until the light turns green? I don’t think so, not for any states that I can think of, anyway. I could see how it could be interfering with or obstructing the flow of traffic, but that’d be more than a bit of a stretch.
This thread is about traffic courtesies that aren’t laws.
It is extremely discourteous to those behind you to not turn right on red when you have the option.
Yes, here in Ohio school busses can’t do a right on red. And tanker trucks hauling hazardous or flammable liquids. But municipal busses can turn right on red, and so can truckers hauling flammable solids or gasses. :dubious: