Like you, I had always heard "k rail". I'm a California native. Apparently, "k rail" is more common in the west because it is the name of spec for concrete barr

Like you, I had always heard "k rail". I'm a California native. Apparently, "k rail" is more common in the west because it is the name of spec for concrete barriers used by the CA Dept of Transportation. You learn something new everyday! https://en.wikipedia.org/wiki/Jersey_barrier https://en.wikipedia.org/wiki/Jersey_barrier