Under which conditions is it illegal to pass another vehicle?

Passing another vehicle is illegal under several specific conditions designed to ensure the safety of all road users.

When prohibited by lines, such as solid lines on the road markings, this indicates that passing is not allowed in that area due to safety concerns. Lines are often used to indicate visibility issues or areas where a higher risk of accidents exists.

Similarly, passing on a curve with an obstructed view poses significant risks because the driver cannot see oncoming traffic or obstacles that might be in their path. This lack of visibility can lead to dangerous situations, as the driver is unable to judge whether it is safe to overtake.

Approaching a hill with an obstructed view also presents a high risk. When a vehicle reaches the crest of a hill, it may not be able to see traffic coming from the opposite direction. If a driver attempts to pass in this scenario, they might collide with another vehicle that is unseen until it is too late to avoid it.

Therefore, all these conditions—prohibited lines, curves with obstructed views, and hills with obstructed views—indicate situations where it is not safe or legal to pass, emphasizing the importance of visibility and road markings in driving safety.