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 | The contents of the Automatic full barriers page were merged into Four-quadrant gate on July 2012. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
I have removed the reference to these being most commonly used on dual carriageways, as this doesn't fit with my experience, and it would seem unlikely, as you can't dodge round the barriers on a dual carriageway anyway, due to the central reservation.
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