We have them in NC as well. I used to be on the local Fire/Rescue Squad, and those cables were surprisingly effective in keeping cars from going all the way across the interstate median... never saw a motorcycle hit one... don't think I would want to. As the interstates have been widened over the past few years, they are going away.. being replaced with the concrete barrier.
They installed them in around Louisville about a year ago. Cable barriers to keep vehicles from crossing the interstate into oncoming traffic. One motorcyclists has already been killed when he crashed into them. Meat slicer.
"Towards the end of the vid, it looks like she may have had a bafflectomy." - MarylandMike
Hundreds of miles of these barriers have been installed in Minnesota the past few summers. They are a make work project for the hiway dept. They have been installed so close to the edge of the hiway in some stretches of hiway that snow plows damage them. But then of course hiway dept. workers get to go out and fix them. And of course the slightest skid on ice sends cars into the barriers and then requires fixing also. Instead of the car being in the snow filled ditch, the car hits the barrier. Car has major damage and the barrier needs to be fixed.