See also:

State emission testing (U.S. only)
WARNING Testing of an All-Wheel Drive vehicle must NEVER be performed on a single two-wheel dynamometer. Attempting to do so will result in uncontrolled vehicle movement and may cause an accident ...

Before starting out on a trip
● Check that the vehicle and vehicle-tohitch mounting are in good condition. If any problems are apparent, do not tow the trailer. ● Check that the vehicle sits horizontally with the tr ...

Flat tires
If you have a flat tire while driving, never brake suddenly; keep driving straight ahead while gradually reducing speed. Then slowly pull off the road to a safe place. ...