To drive safely, it is essential **to observe the rearview mirrors briefly and frequently**. These mirrors allow the driver to see what is happening on the sides and behind the vehicle, which is crucial for maintaining good visibility and being aware of the surroundings.

- **Frequency**: It is important to look at the rearview mirrors regularly during the journey, even if no maneuver is going to be performed. The frequency with which they should be observed depends on the type of road being traveled.

- **Brevity**: When observing the mirrors, it should be done quickly and briefly. This allows the driver to continue paying attention to the rest of the road and what is happening in front, avoiding prolonged distractions.

- **Blind spots**: Although mirrors are useful, they do not show the entire environment. There are areas called **blind spots** that cannot be seen through the mirrors. Therefore, it is important to turn your head and look out the window to ensure there are no vehicles in these areas before changing lanes.


By following these guidelines, driving safety is improved and the risks of accidents are minimized.