<P> Modern variations include the constant - slope barrier and the F - shape barrier . The F - shape is generally similar to the Jersey barrier in appearance, but is taller, with somewhat different angles . </P> <P> The UK equivalent is the concrete step barrier . </P> <P> First tested in 1968 by the then Department of Highways in Ontario, Canada, the Ontario Tall Wall is a variant of the Jersey barrier . Standing at 42 inches (107 cm), it is 10 inches (25 cm) taller than the standard Jersey barrier . In Ontario, the Ministry of Transportation is replacing guiderails (steel guardrail and steel box - beam) with these barriers on 400 - series highways . </P> <P> The New Jersey Turnpike Authority developed and tested a similar, but heavily reinforced, design . This barrier design has been credited with effectively containing and redirecting larger vehicles, including semi-trailer (tractor - trailer) trucks . The states of New York, Massachusetts, and New Jersey have adopted the taller barrier for their roads, as compared to the standard 32 inches (81 cm) suggested by the Federal Highway Administration . </P>

Where did the name jersey barrier come from