To perform an **overtaking** maneuver correctly, it is essential that **both vehicles are in motion**. This is because overtaking involves one vehicle increasing its speed to pass another that is also moving.

- **Overtaking** requires the overtaking vehicle to increase its speed, but without exceeding the maximum permitted limit. This only makes sense if the vehicle being overtaken is also in motion, as the goal is to pass it on the road.

- Additionally, during overtaking, it is crucial to maintain an **adequate distance** from the vehicle being overtaken and to assess the traffic situation, including the speed and distance of oncoming vehicles. This ensures that the overtaking is carried out safely and efficiently.


Therefore, for an overtaking maneuver to be possible and safe, both vehicles must be in motion, which confirms that the correct answer is **"Yes"**.