Also known as: 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 modular Traffic Barrier used 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 state of New Jersey which first started using the barriers as separators between lanes of a highway in the 1950s.