The idea of 'information overload', where the brain simply can't take in and react to any more information, is not new - it's been known about in air safety circles for years. Early experiments found that pilots could react to about 7 different warnings, the rest would be blocked out. Not good if number 8 was an 'incoming missile' warning.
Now it's been recognised within the road safety field, and the Highways Agency has acknowledged that too many signs are causing distraction for drivers, so some will be removed.
And those being removed?
Ah, well . . . they're road safety signs . . .
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