The Road Goes On
Driving on a highway, you might notice the twisted wires that the highway department uses to create a safety barrier. The placement of the barriers is determined by a number of factors–angle of roadside, approaching curvature of the roadway, number of accidents per direction– which all have been carefully studied. In other words, the relationship of driver to road conditions determines placement of the barrier cable. Another interesting fact is that while the cables are strong and flexible (much like a teacher), the steel supports are meant to break and give way to protect the driver in case they accidentally veer off the road into them.