The 85th percentile – the safest way to set speed limits

James C. Walker, National Motorists Association (www.motorists.org), Ann Arbor, Michigan USA
07 February 2014
 

Rod King of campaign group 20’s Plenty for Us applauds the DfT for abandoning the use of 85th percentile speeds for speed limit setting in favour of using mean speeds (Letters LTT 24 Jan).

Please carefully consider what this means. It means the DfT wants to arbitrarily define 50% of all drivers in Britain as criminals. Are 50% of all British drivers doing something dangerous for which they should be arbitrarily defined as criminals? That is not my experience in my 26 year series of visits...

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