What should a driver waiting to make a left turn do when the traffic light turns green?

When a driver is waiting to make a left turn and the traffic light turns green, it is crucial to ensure safety by checking for oncoming traffic before proceeding. While the green light indicates that it is the driver's turn to move, it does not guarantee that the path is clear of danger. Oncoming vehicles may still be approaching, especially if they have a green light of their own.

Therefore, the driver should wait until there is no risk of colliding with oncoming traffic. This practice helps prevent accidents and ensures that the left turn is executed safely. It also emphasizes the importance of being aware of one's surroundings and exercising patience, even when the light is green.

The other options do not prioritize safety in the same way; for instance, turning immediately without hesitation overlooks the need to assess the traffic situation, while waiting until all vehicles have passed could lead to unnecessary delays. Checking the rearview mirror twice is not directly related to making a left turn safely in this context.