What should a driver do if they are waiting in an intersection to make a left turn and the traffic signal light turns red?

When a driver is waiting in an intersection to make a left turn and the traffic signal light turns red, the correct action is to complete the turn if it is clear and safe to do so. This is based on the principle that a driver who is already positioned in the intersection to turn left may legally complete the turn even if the signal changes while they are waiting.

However, this action is contingent on ensuring there are no pedestrians crossing the road, and that the turn can be made safely without interfering with oncoming traffic. If the way is clear and the turn does not disrupt the flow of traffic or endanger others, proceeding with the turn is permitted.

Waiting in the intersection until the light turns green would not be advisable, as this could cause traffic congestion or block through traffic. Backing up from the intersection is typically not a safe or practical option, as it could create confusion or hazard for other road users. Turning right instead may not be lawful or safe depending on the traffic rules at the intersection and the positions of other vehicles and pedestrians. Consequently, completing the turn when safe is the most appropriate course of action in this situation.