A it varies from state to state
If i understood your question right, the cars going straight have to keep going until the red light. but people going either left or right, have to slow down for the other people on the other side of the intersection to cross going either left or right.
Accelerated brain development would be the answer
Yes they do it is they're sworn duty to help those in need, here's a better example if you were driving by the car crash would you drive past it and stare at those in need or would you go and help the injured person/people in the car wreck.
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