Road sign recognition

Marketing designation: Speed Limit Information

Road sign recognition displays current speed limits on the instrument cluster as well as the Head- Up Display. Road sign recognition therefore provides the driver with an aid to prevent excessive speeds. Responsibility for the vehicle and driven speed lies exclusively with the driver. The display of speed limits is based upon the following evaluations:

• Data from navigation system
• Image data from the video camera

Provided data on speed limits for the current road are stored in the navigation data, these are used as the basis by the KAFAS control unit. In parallel to this, the video data from the video camera are also evaluated in the KAFAS control unit. The image data are read in by the KAFAS control unit and evaluated for speed limit and end of speed limit traffic signs. If the video camera identifies signed, local, temporary speed limits, these are displayed with priority over the navigation data. In the case of covered or non-identifiable signs for ending top speed limitations, the speed limit displays are cancelled in accordance with a specified time and route parameters.