To understand why a person who is walking a two-wheeled moped is considered a **pedestrian**, it is important to know the definition of a pedestrian and how it applies in this context.

- **Pedestrian**: It is not only the person who walks on the sidewalk or the road, but also those who carry a bicycle or a two-wheeled moped while walking. This means that, although the moped is a vehicle, the person who walks it is classified as a pedestrian.

- The key is that the person is **walking** and not riding the moped. By walking and carrying the moped, it is equated to other situations where people push or pull small non-motorized vehicles, such as baby carriages or wheelchairs.

Therefore, according to the definitions provided, a person who is walking a two-wheeled moped is considered a **pedestrian**.