Limitations of Intelligent Speed Limit Assist

Intelligent Speed Limit Assist may operate abnormally or unexpectedly under the following circumstances:

  • The road sign is dirty or difficult to read.

    • The road sign is difficult to see due to inclement weather, such as rain, snow, or fog.

    • The road sign is partially obscured by surrounding objects or shadows.

    • The road sign is bent or installed at an angle.

  • The road signs do not conform to the standard expected by Intelligent Speed Limit Assist.

    • The text or picture on the road sign is different from the standard expected by Intelligent Speed Limit Assist.

    • The road sign is installed between the main road and the exit road, or between diverging roads.

    • A sign is attached to another vehicle

  • The distance between the vehicle and the road signs is far

  • When traffic signs are installed high above the road

  • When the vehicle speed is high and there is insufficient time to recognize the traffic sign

  • When frequently using turn signals in lanes adjacent to an exit

  • When driving closely behind a preceding vehicle

  • When supplementary signs or advertisements are installed near the traffic sign

  • When communication with the map server is unstable

  • When the navigation system reboots while driving

  • When there is a change of country

    • When the vehicle crosses a national border

    • When the country setting is changed via the country selection menu

  • The road signs are illuminated.

  • Intelligent Speed Limit Assist incorrectly recognizes numbers or pictures in the street signs or other signs as the speed limit

  • Intelligent Speed Limit Assist detects a sign on a nearby road.

  • Multiple signs are installed close together

  • A minimum speed limit sign is mistakenly recognized as a maximum speed limit sign.

  • The brightness changes suddenly (for example, when you enter or exit a tunnel).

  • You are not using the headlights, or the brightness of the headlights is weak at night or in a tunnel.

  • Glare from the sun obstructs the front view camera’s field of view.

  • Road signs are difficult to recognize due to the reflection of sunlight, street lights, or oncoming vehicles

  • The navigation or GPS information contains errors.

  • You do not follow the guidance of the navigation.

  • You are driving on a sharply or continuously curved road.

  • You are driving over speed bumps, or driving up and down or left to right on steep inclines.

  • The vehicle is shaking heavily.

  • You are driving on a new road.

  • You are driving on a road under construction.

  • The navigation software updates while you are driving.

WARNING
  • Intelligent Speed Limit Assist is a supplemental function that can help you comply with the posted speed limit. This function may not display the correct speed limit or control the driving speed properly.

  • It is your responsibility to follow the speed limit.

  • Intelligent Speed Limit Assist may not operate for 15 seconds after you start the vehicle or initialize or restart the front view camera.

TIP

For more information about the limitations of the front view camera, refer to Forward Collision-avoidance Assist (FCA) (Sensor Fusion).