Jersey Barrier Manufacturer in Delhi, Gurgaon, Punjab, Haryana, Uttar Pradesh, Jaipur, etc HIGH QUALITY JERSEY BARRIERS MANUFACTURER AND SUPPLIER FROM DELHI, INDIA. A Jersey barrier or Precast Jersey wall is a modular Precast Concrete Barrier employed to separate lanes of traffic. It is designed to minimize vehicle damage in cases of incidental contact while still preventing the crossover case of a head-on collision. Jersey Barriers are also used to reroute traffic and protect pedestrians during highway construction, as well as temporary and semi-permanent protections against landborne attack such as suicide vehicle bombs. A Jersey barrier is also known as concrete traffic barriers, or colloquially as a Jersey bump.