If the traffic signal turns red while you are in the middle of an intersection waiting to turn left, you should:

Question

If you are already within an intersection when the light changes from green to yellow, do not stop. Proceed cautiously, completing the left turn when it is safe to do so. When making a left turn, you must always yield to oncoming traffic.

Accepted Answer

Complete the turn when traffic clears.

Answer

Stop until the light changes to green.

Answer

Back out of the intersection, if possible.