K-rail ジャージー・バリア ジャージー・ウォール ジャージー・バンプ
A portable barrier employed to separate lanes of [[traffic]], made of plastic or concrete. Plastic ones can be filled with [[water]] for additional weight. It is named after the [[united states|U.S.]] state of New Jersey which first started using the barriers as separators between lanes of a highway in the 1950s.

h1. See also
* [[guard rail]]
* [[traffic cone]]

h1. External links
* "Wikipedia: Jersey barrier":https://en.wikipedia.org/wiki/Jersey_barrier
jersey barrier