Which of the following best describes the function of a blind corner?

The best description of the function of a blind corner is that it limits visibility and increases the risk of collisions. A blind corner occurs when the line of sight is obstructed, making it difficult for drivers to see oncoming traffic, pedestrians, or other potential hazards. This lack of visibility can create a dangerous situation where drivers may not be able to react in time to avoid an accident.

In contrast, other options suggest either ensuring visibility or offering specific designated functions, which do not accurately reflect the inherent danger associated with blind corners. For instance, a corner that allows for full visibility would not be described as a "blind" corner, and it cannot logically serve a safe function for overtaking if visibility is compromised.