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  1. 693 votes
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    5 comments  ·  Obama CTO  ·  Admin →
    pancake supported this idea  · 
  2. 5,990 votes
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    26 comments  ·  Obama CTO  ·  Admin →
    pancake supported this idea  · 
  3. 13,736 votes
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    38 comments  ·  Obama CTO  ·  Admin →
    pancake supported this idea  · 
  4. 7,008 votes
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    111 comments  ·  Obama CTO  ·  Admin →
    pancake supported this idea  · 
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    pancake commented  · 

    I think he trick is to do this slowly. Whenever a road sign is replaced, use both metric and standard units. Since the signs would be replaced anyway, there is no additional cost to changing them. Also require that speedometers in cars read in both km/hr and miles/hr.