How do Audi A7's 'Traffic Sign Recognition' feature works?

I'm interested to know more about the 'Traffic Sign Recognition' feature in the Audi A7. How does it work and does it have any limitations?

The 'Traffic Sign Recognition' feature in the Audi A7 uses a camera to detect road signs and displays them on the dashboard. It is able to recognize both speed limits and traffic signs such as stop signs and no entry signs.

However, it is important to note that this feature relies on clear visibility and may not work well in poor weather conditions or when signs are partially obstructed.