Design concept of crash barrier:

According to the "Code for Design of Highway Traffic Safety Facilities" (JTG D81-2006), the guardrail is defined as (Article 2.0.1), as a longitudinal energy-absorbing structure, the guardrail absorbs collision energy through self-deformation or vehicle climbing, thereby Change the driving direction of the vehicle, prevent the vehicle from going off the road or entering the opposite lane, and minimize the injury to the occupant. Under the set impact conditions, the guardrail shall have the following functions:

1) Prevent vehicles from going off the road or crossing the median into the opposite lane;

2) Prevent the vehicle from drilling out from under the guardrail, or breaking the guardrail;

3) The guardrail should enable the vehicle to return to the normal driving direction;

4) Minimal damage to passengers in the event of a collision;

5) Can induce the driver's sight.