Why might a turn assist system not always detect that a cyclist is present?

The selected combination of answers is correct because each factor can impede a turn assist system's ability to detect cyclists.

1. Dirt on the sensor can obstruct the sensor’s view, making it difficult to accurately perceive surrounding objects, including cyclists.
2. Parking cars can physically block the line of sight of the sensor, preventing it from detecting a cyclist who may be present but not visible due to obstructions.
3. A damaged sensor may malfunction or fail to operate altogether, which would also lead to a lack of detection of cyclists.

In German traffic regulations, the safety of all road users, including cyclists, is paramount. This underscores the importance of ensuring that turn assist systems are functioning properly and have a clear field of view to detect vulnerable road users effectively. Failure to address these issues can lead to accidents, highlighting the need for regular maintenance and awareness of the surrounding environment while driving.