Campaign group’s criticism of 20mph report is ill-informed

Mike Maher (Co-author of the Atkins report) Honorary professor Department of Civil, Environmental and Geomatic Engineering University College London North Berwick East Lothian EH39

01 February 2019

20’s Plenty is wrong to champion a study of Bristol’s 20mph limits while criticising the DfT’s research project, says Mike Maher

I write in response to the criticisms by campaign group 20’s Plenty for Us of consultant Atkins’ report for the DfT on the effectiveness of 20mph speed limits (Letters LTT 14 Dec 18).

Whilst their disappointment that the study found no significant reduction in casualties is perhaps understandable, it is no excuse for some of the badly-informed and misleading statements made by 20’s Plenty for Us about supposed weaknesses of the study’s methodology.

If we are...