Jersey barrier

noun2

1. •
   A modular concrete or plastic barrier designed to create walls that separate lanes of traffic or to block traffic.

   • One incident in May was a possible threat indicator when a Jersey barrier on the east perimeter was rammed by a slow-moving car. — 2013
2. •
   A Jersey wall; a wall composed of Jersey barriers that separates lanes of traffic.

   • The same result was found when measuring the length of Jersey barrier or guardrail within the 800 m buffer in high- and low-kill UVC zones. — 2008