The **tunnel effect** occurs when you drive at an excessive speed, which reduces your ability to see what is happening on the sides and makes you focus only on what is directly in front of you, as if you were going through a tunnel. This is especially dangerous at **intersections**.

- At an intersection, it is crucial to be aware of what is happening on the sides, as other vehicles, pedestrians, or traffic signals may appear that require a quick response.
- The tunnel effect limits your peripheral vision, which increases the risk of not detecting these elements in time and can lead to serious accidents.

Therefore, it is important to moderate your speed when approaching an intersection to avoid the tunnel effect and be able to react appropriately to any unexpected situation.