You can turn right on a red light and a left red arrow. If there
is a sign that says "no right turn on red" or it's a right red
arrow, you can't turn right.
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Typically, in states that allow right-on-red, it is legal unless
there is a sign posted that says "No Turn On Red"
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You can turn left at a red light only if signs specifically
permit it. Usually, only right turns are permitted on red when
clear.
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Yes, they do. If you have a green signal to turn left, the
opposing lane will have a red light. Even though vehicles may turn
right on red (unless otherwise indicated), they are still required
to stop and yield right of way on a red light.