See also:

Why Safety Belts Work
When you ride in or on anything, you go as fast as it goes. Take the simplest vehicle. Suppose it is just a seat on wheels. Put someone on it. Get it up to speed. Then stop the vehicle. ...

Fog Lamps
To turn on the fog lamps, the ignition and the headlamps or parking lamps must be on. If the fog lamps are turned on while the exterior lamp switch is in the AUTO position, the headlamps come on ...

Fuel Additives
To provide cleaner air, all gasolines in the United States are now required to contain additives that help prevent engine and fuel system deposits from forming, allowing the emission control syste ...