When a driver waiting to make a left turn sees the traffic light turn green, they should:

When a driver is waiting to make a left turn and sees the traffic light turn green, the safest and most responsible action is to turn only after ensuring there is no danger from oncoming vehicles. This approach prioritizes the safety of all road users, as turning left can present significant risks if oncoming traffic is approaching, particularly at high speeds or if other vehicles are not yielding.

Turning immediately, regardless of traffic conditions, could lead to collisions if there are vehicles still traveling straight through the intersection. It's essential to assess the flow of oncoming traffic, as well as the actions of pedestrians and any other road users, before proceeding with the turn.

Waiting for the next green light before turning is unnecessary since the light is already green, and making a U-turn would be inappropriate in this context, as U-turns are not permitted in many intersections and could also lead to hazardous situations.

The proper approach emphasizes situational awareness and caution, ensuring the driver only turns when it is safe to do so.