The **seat belt** is a crucial element of **passive safety** in vehicles. Its main function is to protect occupants in the event of an accident, preventing them from being displaced from their seats or ejected from the vehicle. This significantly increases the chances of surviving an accident, reducing the likelihood of death by almost half.

For the seat belt to be effective, it must be properly fastened and adjusted to the body. The **chest strap** should pass over the collarbone and the center of the chest, while the **lap belt** should be placed over the hip bones, always below the stomach. Incorrect placement can cause serious injuries in the event of an accident.


Additionally, it is important to avoid the **submarining effect**, which occurs when the body slides under the belt during an accident. To prevent this, the belt must be well adjusted, and the seat should not be reclined backward. It is also advisable to avoid placing objects like towels or cushions on the seat that could cause sliding.


In summary, the correct use of the seat belt is vital to significantly reduce the risk of death in traffic accidents.