The pedestrian is not fully captured by the camera sensor, or the pedestrian does not walk in the upright position.

The pedestrian moves very fast.

The pedestrian abruptly appears in front.

The pedestrian wears clothes in the colour similar to the background.

The outside is too bright or too dark.

The vehicle drives at night or in the darkness.

There is an item similar to a person’s body structure.

The pedestrian is small.

The pedestrian has impaired mobility.

It is difficult to distinguish the pedestrian from the surroundings.

The sensor recognition is limited.

There is a group of pedestrians.

If a sudden change in the sensor recognition takes place whilst passing through the speed bump.

When the vehicle is severely shaken.

When driving around circular intersection after the vehicle in front.

If the front of the camera lens is contaminated by front glass tinting, film, water repellent coating, damage on glass, foreign matter. (sticker, insect, etc.)

The radar or camera or camera lens is damaged.

If the headlights of the vehicle are not used at night or in the tunnel section, or the light is too weak.

If street light or the light of the vehicle coming from the opposite is reflected or when sunlight is reflected by the water on the road surface.

When the back light is projected in the direction of the vehicle's motion (including the headlights of vehicles).

Road sign, shadow on the road, tunnel entrance, toll gate, partial pavement.

If the windscreen has moisture on its surface or if windscreen freezes.

Driving in the fog.

When objects are out of the sensing range of the sensor or radar.

When the cyclist in front is riding intersected with the driving direction.

When there is any other electromagnetic interference.

When the construction area, rail or other metal object is near the cyclist.

If the bicycle material is not reflected well on the radar.