Personal mobility vehicles, such as electric scooters and electric unicycles, have certain restrictions on where they can circulate. These vehicles are equipped with an electric motor that allows them to reach speeds between 6 and 25 kilometers per hour.

- **They cannot circulate on sidewalks or pedestrian areas**. This is because sidewalks are exclusively intended for pedestrians, who must walk on them whenever possible. Personal mobility vehicles, having a motor, are not considered pedestrians and, therefore, should not use sidewalks.

- Instead of sidewalks, these vehicles must **circulate on the roadway**, which is the part of the road intended for vehicle traffic. This ensures that they do not interfere with pedestrian passage and that safety is maintained in pedestrian areas.

Therefore, the correct answer is that drivers of personal mobility vehicles must circulate on the roadway and not on the sidewalks.