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National Speed limit signs

Thursday, February 11, 2010 at 08:16PM
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As far as I know the reason that the National Speed Limit sign is a black diagonal line trough a white background instead of 60mph is that when speed limits were first introduced they only applied in built-up areas. When drivers left the built-up area they were informed by a derestricted sign. When our present system of speed limits came into force all derestricted areas became the National speed limit of 60mph. As there were thousands of these signs throughout the country it was not though economical to change them to 60mph.

Note: Some years later the 70mph speed limit was introduced on motorways and dual-carriageways so we now have 2 speeds for the national speed limit - 60mph on A roads and 70mph on motorways and dual-carriageways.

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Tuesday, December 8, 2009 at 10:52AM
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