Helmets are constructed out of three main parts: the shell, liner, and interior. The shell is usually a hard plastic, designed to skid, prevent neck injuries, and deflect penetrating objects. The liner is the hard foam part of the helmet that compresses and takes most of the force in an impact. The interior is the soft padding that is designed to provide comfort and fit.

seat belts promote safety. More specifically, seat belts can aid in the following: Preventing you from hitting the windshield
Preventing you from being thrown from the vehicle
Preventing you from banging around the vehicle and hitting the steering wheel, door, etc.
Women who are pregnant are more protected when they're wearing a seat belt

To follow rules and regulation of safe driving, knowing the traffic and road signs is important. There are many signs used around the world, try this quiz and find out how many questions can you Answer correctly.