Road Sign Information

Limitations of Road Sign Information*

Updated 11/9/2020

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*.

    with outdated, incorrect or missing speed information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 map data.


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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