How should a driver act if they are at an intersection and a red signal appears while waiting to turn left?

When a driver is at an intersection waiting to turn left and a red signal appears, the appropriate action is to yield to oncoming traffic and complete the turn, provided that it is safe to do so. In many jurisdictions, when you are already in the intersection waiting to turn left, you are allowed to complete the turn on red after ensuring that no oncoming traffic or pedestrians are present. This allows for a safer and more efficient flow of traffic.

In contrast, waiting in the intersection until the light turns green could cause congestion or disrupt traffic flow. Making a U-turn immediately would not only be unsafe but could also violate traffic regulations, especially if there are no signs allowing such a maneuver at that intersection. Backing up from the intersection would not be advisable either, as it can create confusion and danger for both the backing vehicle and any traffic behind them. Therefore, yielding to oncoming traffic and completing the turn when safe is the most sensible and lawful action.