When overtaking pedestrians outside of built-up areas, it is essential to maintain a **lateral separation of no less than 1.5 meters**. This distance is crucial to ensure the safety of both the pedestrian and the driver.

- **Lateral separation** is the necessary distance between two vehicles or between a vehicle and a pedestrian to avoid any danger. Maintaining an adequate distance is especially important when driving at high speed, on poorly maintained roads, or in adverse weather conditions such as rain or fog.

- When overtaking, it is essential to leave enough space to avoid dangerous situations, such as the risk of hitting the pedestrian or making the pedestrian feel unsafe.

- Additionally, by maintaining this distance, it is ensured that the vehicle is not in the **blind spot** of other vehicles, which could cause accidents.

Therefore, the minimum distance of 1.5 meters must always be respected when overtaking pedestrians outside of built-up areas to ensure the safety of all road users.