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Best practice options: 20mph speed limits
It has been clear for some time that choosing 30mph as the default urban speed limit was a blunder, resulting in large numbers of deaths and injuries, and a public health disaster from the deterrence of walking and cycling.
Lowering the speed limit in residential areas from 30mph to 20mph:
- is effective in reducing casualties e.g. the 40% reduction in road casualties in the study of London's 20mph zones [1]
- works well in the Netherlands (and elsewhere) where the 30kph limits contribute to the large numbers of children walking and cycling and the healthy population.
- has the support of a large proportion of the population e.g. in the 2015 British Social Attitudes Survey [2]:
The figures for 20mph speed limits were: Strongly in favour / In favour | 68 | Neither in favour nor against | 15 | Against / Strongly against | 13 | Can’t choose / Not answered | 4 |
So, 20mph limits with compliance should by now be the norm in residential areas in the UK.
References[1] www.bmj.com/content/339/bmj.b4469 [2] British Social Attitudes Survey 2015: Public attitudes towards transport (2017) Department for Transport (page 27) https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/586193/british-social-attitudes-survey-2015.pdf Percentages and changes over time can be downloaded from https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/640245/att0359.ods [3] DfT Circular 01/2013 Setting local speed limits (2013) https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/63975/circular-01-2013.pdf
Last updated: 12 Jan 2020
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