See also:

Example of the type of accident in which the SRS curtain airbag will basically not deploy.
The SRS curtain airbags are not basically designed to deploy if the vehicle pitches end over end. ...

Speedometer
The speedometer shows the vehicle speed. ...

Difference between screen and actual road
The distance markers show the distance for a level road when the vehicle is not loaded. It may be different from the actual distance depending on the loading conditions or road conditions. ...