What is required to legally pass another vehicle on a two-lane road?

To legally pass another vehicle on a two-lane road, having a clear view of the road ahead and no oncoming traffic is essential for safety. This requirement ensures that the driver can see any potential hazards, such as oncoming vehicles or obstacles, allowing for a safe maneuver. By ensuring there is no oncoming traffic, the driver minimizes the risk of head-on collisions, which can be catastrophic. This is why clear visibility is a foundational rule for safe driving when overtaking.

The other choices do not accurately reflect safe passing requirements. It is not always legal to pass — there are specific conditions and zones where passing is prohibited, such as curves or near intersections. Similarly, there is no legal requirement to notify another driver before passing, as signaling your intent is considered good practice but not mandated. Lastly, stating that passing is illegal at all times is incorrect; it is permitted under the right conditions, particularly when it's safe and legal to do so.