To change the cruising speed

See also:

Example of accident in which the driver’s/driver’s and front passenger’s SRS frontal airbag(s) will most likely deploy.
A head-on collision against a thick concrete wall at a vehicle speed of 12 to 19 mph (20 to 30 km/h) or higher activates only the driver’s SRS frontal airbag or both driver’s and front passenger’s S ...

When there is a downward slope at the back
1) 3 feet (1 m) The distance on the screen looks nearer than the actual distance. NOTE When cargo is loaded, the rear view distance on the screen looks farther than the actual distance a ...

Speedometer
The speedometer shows the vehicle speed. ...