Limitations of Intelligent Speed Limit Assist
Intelligent Speed Limit Assist may not operate properly, or it may operate unexpectedly under the following circumstances:
-
The road sign is contaminated or indistinguishable
-
The road sign is difficult to see due to bad weather, such as rain, snow, fog.
-
The road sign is partially obscured by surrounding objects or shadow
-
-
The road signs do not conform to the standard
-
The text or picture on the road sign is different from the standard
-
The road sign is installed between the main line 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
-
The vehicle encounters illuminating road signs
-
Intelligent Speed Limit Assist incorrectly recognises numbers or pictures in the street signs or other signs as the speed limit
-
A road sign near the road you are driving is detected
-
Multiple signs are installed close together
-
The minimum speed limit sign is misrecognized
-
The minimum speed limit sign is on the road
-
The brightness changes suddenly, for example when entering or exiting a tunnel or passing under a bridge
-
Headlamps are not used or the brightness of the headlamps are weak at night or in the tunnel
-
The field of view of the front view camera is obstructed by sun glare
-
Road signs are difficult to recognise due to the reflection of sunlight, streetlights, or oncoming vehicles
-
The navigation information or GPS information contains errors.
-
The driver does not follow the guide of the navigation.
-
Driving on a road that is sharply curved or continuously curved
-
Driving through speed bumps, or driving up and down or left to right on steep inclines
-
When driving on a road under construction.
-
The vehicle is shaking heavily
-
Driving on a new road
-
The navigation is being updated whilst driving
-
The navigation is being restarted whilst driving
-
Intelligent Speed Limit Assist is a supplemental function that helps the driver to comply with the speed limit on the road, and may not display the correct speed limit or control the driving speed properly.
-
It is the responsibility of the driver to keep the speed limit.
-
It may not operate for 15 seconds after the vehicle is started, or the front view camera is initialized or restarted.
For more details on the limitations of the front view camera, refer to Forward Collision-Avoidance Assist (FCA) (Sensor Fusion) .