Aesop many centuries ago wrote the fable "The Boy who cried Wolf" - hence the phrase "cry wolf". About a shepherd boy who cried wolf so often that when there really was wolf no one from the village came to help.
The Department of Transport (all 18000 of them) clearly haven't picked up on this. It is a complete waste of money spending millions on motorway warning and information signs if they are wrong. An equal waste of money when they inform the motorist of the blindingly obvious - eg: its raining, its snowing.
A survey of motorists to understand how many take the messages seriously and react accordingly, note them and pay a little more attention, or simply assume they are wrong would be interesting. I probably fall in the middle category!
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