Structural adaptability requirements
The vehicle can not wear, or severing, jumped over the fence, to prevent the vehicle driving way into or on the road, rail vehicle can be smoothly change the wrong direction, to prevent the guardrail components in the car into the cabin by collision or a danger to other traffic. This is the strength requirements of the fence.
Two, the safety requirements of the occupants of the car
Later during the collision and collision, the vehicle should maintain the original attitude, the impact of acceleration the passenger does not hurt, when the vehicle collision guardrail, fence should have the elastic-plastic deformation to absorb collision energy, reduce the damage to the vehicle, and can prolong the action time of the collision process, to ensure the safety of passengers in the car.
Three, the vehicle trajectory requirements.
Vehicle collision guardrail, the vehicle with a small angle to the direction of travel from the original, the trajectory of the vehicle and the final stop position does not affect the other lane vehicle.
Four, the vehicle has the effect of line of sight.
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