See also:

Speedometer
The speedometer shows the vehicle speed. ...

Tire labeling
Many markings (e.g. Tire size, Tire Identification Number or TIN) are placed on the sidewall of a tire by tire manufacturers. These marking can provide you with useful information on the tire. ...

Driving when tired or sleepy
WARNING When you are tired or sleepy, your reaction will be delayed and your perception, judgment and attentiveness will be impaired. If you drive when tired or sleepy, your, your passengers’ and ...