What is one major reason to avoid passing near hills or curves?

One major reason to avoid passing near hills or curves is reduced visibility. When driving in these areas, your line of sight is limited, making it difficult to see oncoming traffic or obstacles in the road. This lack of visibility increases the risk of a collision, as you may not be able to gauge whether it's safe to pass or if another vehicle is approaching at high speed. The road may also have unexpected conditions that are hard to detect from a distance. Ensuring clear visibility is crucial for making safe driving decisions, especially when attempting to overtake another vehicle. Thus, avoiding passes in these environments helps maintain safety for everyone on the road.