Road Sign Information

Limitations of Road Sign Information*

Updated 1/21/2020

Limitations of Road Sign Information*

The Road Sign Information (RSIRoad Sign Information) function may have limitations in certain situations.

Examples of what can reduce the function are as follows:

  • Faded signs
  • Signs positioned on bends
  • Rotated or damaged signs
  • Signs positioned high above the roadway
  • Fully/partially obscured or poorly positioned signs
  • Signs completely or partly covered with frost, snow and/or dirt
  • Digital road maps

    In cars equipped with Sensus Navigation*.

    are out-of-date, inaccurate or have no speed information

    Map data with speed information does not exist for all areas.



In certain markets, the Road Sign Information function* is only available in combination with Sensus Navigation*.


The RSI function may interpret some types of bicycle rack, connected to the electrical socket for trailers, as a connected trailer. In such cases, the driver display may show incorrect speed information.


This function uses the car's camera and radar units, which have certain general limitations.

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