What should a driver on the right side do when turning left?

When a driver on the right side is preparing to turn left, it is crucial to give a directional signal first. This indicates the driver's intention to other road users, thus enhancing safety and communication on the road. Following the signal, the driver should then carefully watch traffic, ensuring that it is safe to complete the turn without interfering with other vehicles or pedestrians.

This approach is pivotal in maintaining road safety because it allows surrounding vehicles and pedestrians to anticipate the driver's actions. Not using a directional signal would leave others unsure of the driver’s maneuver, potentially leading to accidents. Additionally, checking traffic before making the turn helps to avoid collisions and ensures that the driver has the right of way.

Turning left without signaling or checking traffic disregards standard driving practices and increases the risk of accidents. The other options present unsafe behaviors that fail to prioritize the driver’s responsibility to communicate and navigate safely within the traffic environment.