Which of the following elements can cause a curve to lack sufficient visibility?
Safe driving
Explanation
To determine if a curve lacks sufficient visibility, it is important to consider the **elements that may obstruct the driver's view**.
- **Trees** are a factor that can block visibility on a curve. When there are trees near the road, their branches and leaves can prevent the driver from clearly seeing the road, especially on curves where the direction of the road changes and the entire width of the road cannot be seen. This is known as a **reduced visibility curve**.
- Other elements, such as **information panels** and **vertical signs**, are generally designed and placed in a way that does not interfere with the driver's visibility. These elements are usually located in strategic places to inform without obstructing the view.
Therefore, trees are the element most likely to affect visibility on a curve, making it lack sufficient visibility.
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