When the road is divided into three lanes, when should you use the centre lane?

The correct focus is on the importance of the center lane in a three-lane roadway. The center lane is typically designed for through traffic, allowing vehicles to travel straight ahead while keeping the right lane for slower, local traffic and the left lane primarily for overtaking or faster-moving vehicles. When you are either turning right or going straight ahead, utilizing the center lane helps maintain the flow of traffic and ensures safety for all road users. This is especially relevant in scenarios where drivers in the right lane are preparing to make a right turn, thus keeping the center lane clear for those continuing straight.

The other choices do not align with the primary purpose of the center lane. For instance, the left lane is generally intended for overtaking, and while turning left may involve using the left lane, it would not typically require the center lane. Using the center lane when it is occupied, or solely for overtaking, does not adhere to the standard traffic flow rules, which prioritize the center lane for through movements.