Right turn on red (after stop) was a federal thing to yes ease congestion but more importantly to save gasoline and the C02 created by automobiles idling in traffic for no reason, most states embraced the idea while others such as Connecticut who didn’t and put up no turn on red signs on virtually every intersection in the state, the state was eventually sued and lost and had to remove 95% of the no turn on red signs.
The bigger issue now is people don’t STOP before turning red.
Is partially what am trying to get at too. Can be very frustrating.