Function of crash barrier

Many people would ask what is the Function of crash barrier? Why cannot we change it with mesh fence or something lighter than crash barrier?
Crash barrier function is more than what we usually think!
Guardrails keep cars running in their designated lanes and avoid colliding with each other
Guardrails can prevent cars from falling over edges of roads on hills while traversing through mountainous terrains with sharp turns
Guardrails can keep vehicles on track in housing complexes with large driving spaces
Also W-beam can protect vehicles from colliding against fixed natural or man-made objects like boulders, trees, rocks, and so on.
How guardrails work

To people not in the guardrail business, the guardrail may seem like just a simple structure. But a lot of scientific and engineering acumen has to go into its making for proper functioning. The end terminal of a guardrail is made of a flat and strong piece of steel, which is made with the view of withstanding any collision with a car.

So, if a car hits the guardrail, it is made to stay on the highway rather than go berserk and errant due to the unexpected bang. So, by stopping the car from rolling over uncontrolled, physical damage to drivers and passengers can be prevented or minimized to a large extent. The making of the face of the guardrail is also important to determine how far the car will travel before coming to a halt once it has come in contact with the guardrail.

With this knowledge, you will be able to appreciate how crucial it is to assemble the components of the guardrails in order to ensure their effectiveness.