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This rolling barrier can save your life

 This rolling barrier can save your life 

The design is very promising, wonder the principle behind it - if this is on a Freeway and the collision diverts the vehicle back on track - increasing the possibility of getting hit by a trailing vehicle.Would it be helpful to have some sort of dampeners to absorb the impact while guiding the vehicle to a sloped ditch? The car should loose it's energy 0,5 × mass x speed x speed. It won't happen with this barrier. We need energy dissipation to have a safe barrie.

Looks like a great invention for converting forward momentum into rotational energy and significantly reducing the energy involved - could be huge life-saving device. Do you have any statistics of the reduced collisions and severity of damage and of course injury???

I think what is more important than the barriers themselves is how deep their pillars penetrate the soil for achieving the sufficient rigidity that really withstands the shock load. Without the pillars adequately penetrating the soil, it is doubtful the barriers remain intact/stationed following the hit.

I understand why having flexible barriers be a good thing, as bending may increase the distance of deceleration and thus reduce maximum g loading. But I also fail to understand why rolling bars is a good idea.Also note that some cars had been deflected back into the highway elastically. Not only this prevents the energy from being dissipated, it also increases go lodings, non elastic collision it would change from v to 0. Also note that some cars had been deflected back into the highway elastically. Not only this prevents the energy from being dissipated, it also increases go lodings, non elastic collision it would change from v to 0.

Can be efficient, but if they do not absorb a proper amount of energy and just push the vehicle around, they might cause secondary slips and collisions

This barrier seems to be better than the concrete barriers in correcting vehicles back into the lane, but it does not seem to be reducing speed by energy absorption. The structural frame seems rigid and does not seem to be failing. After such a crash, the barrier must fail with significant permanent deformation. This is not the case. Probably the structure could be made of softer materials or lesser stiffness.

he design is very promising, wonder the principle behind it - if this is on a Freeway and the collision diverts the vehicle back on track - increasing the possibility of getting hit by a trailing vehicle

Applause to the South Koreans from ETI. It is interesting:

1. the concept of transformation from kinetic energy (coming from the shock due to the collision) into rotational energy

2. efficient redirection of the vehicle to its original path

3.visibility in the dark ,It could be useful to know some differences with the traditional systems; for example, the comparison about the post-impact speed and the post-impact angle


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