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What a Blue Stop Sign Means and Why Drivers Need to KnowThe website says blue stop signs are most often found on private ... Blue remained part of the traffic light color scheme up until 1973 when government moved to used green instead as long as ...
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Your phone's blue light won't actually stop you sleeping, according to an expert – but your phone is still the problemAdmit it. We know our phones keep us awake. Some people try to mitigate the negative effects on sleep with blue-light glasses, which claim to block out rhythm-affecting blue tones in screen light ...
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