To perform a **reverse maneuver** safely, it is essential to **observe the traffic** before starting. This involves carefully looking at the road and surroundings, both directly and through the **rearview mirrors**. This step is crucial to ensure there is no danger to other drivers or pedestrians.

- **Reversing** is only allowed in specific situations, such as when parking or when it is not possible to move forward. In these cases, it is essential to drive at a very low speed and stop if any danger arises, such as the approach of another vehicle or pedestrian.

- The **R.S.M. safety rule** (Rearview mirror, Signal, Maneuver) highlights the importance of observing before performing any maneuver. This first step, "Rearview mirror," emphasizes the need to check the surroundings to ensure the maneuver can be performed without risks.

Therefore, observing the traffic is the first and most important step to perform the reverse maneuver safely and responsibly.