The **position lights** are essential for road safety, as their main function is **to indicate the presence and width of the vehicle**. These lights are located at the front, rear, and sides of the vehicle, allowing other drivers and pedestrians to clearly see the vehicle and understand its size, especially in low visibility conditions.

- **When they are used:** Position lights are mainly used in low visibility situations, such as when driving at night, passing through tunnels, or on dark days. Although they are always turned on together with other lights when the vehicle is in motion, they can be used alone when the vehicle is stationary, for example, due to a breakdown on a poorly lit road.

It is important not to confuse position lights with other vehicle lights, as their specific purpose is to ensure that the vehicle is visible and that its width is clear to others.