Modular concrete or plastic barrier for separating vehicle traffic
"K-rails" redirects here. For the Indian rail company, see K-Rail (Kerala Rail Development Corporation).
Jersey barriers on the road
A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic. It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision. Jersey barriers are also used to reroute traffic and protect pedestrians and workers during highway construction. They are named after the U.S. state of New Jersey which first started using the barriers as separators between lanes of a highway in the 1950s.
The barriers are also known as a K-rail, a term stipulated in the California Department of Transportation specification for temporary concrete traffic barriers which first started using concrete median barriers in the mid-1940s.[1][2]
Over time, different variants were created. Taller variants, such as the Ontario Tall Wall, proved more effective at stopping vehicles and had the added advantage of blocking most oncoming headlights. More modular variants, including plastic water-filled barriers, have been created.
^"Development of Staking Configurations for K-Rail" (PDF). California Department of Transportation. Retrieved 31 May 2020.
^TechXpress.net. "20' K-Rails (Caltrans Standard)". midstateconcrete.com. Retrieved 27 September 2018.
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