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Letter

Defending 20 mph speed limits

20 mph speed limits are the right policy for sociability, safety, and a healthy population

BMJ 2012; 345 doi: http://dx.doi.org/10.1136/bmj.e6165 (Published 18 September 2012)
Cite this as: BMJ 2012;345:e6165

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  1. Sarah Ingamells, foundation doctor1,
  2. Angela Raffle, consultant in public health—wider determinants of health1
  1. 1NHS Bristol, Bristol BS1 3NX, UK
  1. sarah.ingamells{at}nhs.net

Your article implied that new evidence has emerged against 20 mph (32 km/h) limits.1 Nothing is further from the truth.

  • • Detailed analysis of 20 years of data showed a 41.9% reduction in road casualties in 20 mph zones2

  • • The limit’s key aim is to encourage more considerate driving; this should increase walking and cycling and …

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