How does the traffic sign recognition system in an Audi A6 work?

I'm curious about the technology behind the traffic sign recognition feature in an Audi A6. Can someone explain how it functions and how accurate it is?

The traffic sign recognition system in an Audi A6 uses a front-facing camera to detect and read traffic signs, including speed limit signs and no passing signs. It relies on image processing and pattern recognition algorithms to accurately identify and interpret the signs.