These cable systems will save lives.
Looking at the last picture, that is a sub standard cable system. It uses eyebolts to connect the cables. BAD idea
It needs to be at grade not below grade.
Best wished for everyone that was involves and I hope your cars are replaces or fixed.
Get well fast Stuart.
Here is a Video of the current design of the cable barriers that work
http://www.youtube.com/watch?v=10L8421s18Q