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Research

The health risks and benefits of cycling in urban environments compared with car use: health impact assessment study

BMJ 2011; 343 doi: https://doi.org/10.1136/bmj.d4521 (Published 04 August 2011) Cite this as: BMJ 2011;343:d4521

Rapid Response:

Re:Cycling in Urban environment: More needs to be done

The authors wrongly assume that the majority of the users of this
scheme switched from car driving, invalidating many of their claims.

What surprises me most are the relatively similar mortality rates
quoted in this study for cyclists and car drivers. In Britain in 2009 the
relative death rates per billion miles travelled were 34 v 2.8 (cyclists v
car drivers)- a 12 fold difference.

http://www2.dft.gov.uk/adobepdf/162469/221412/221549/227755/rrcgb2009.pdf

Competing interests: No competing interests

31 August 2011
William P Soutter
Gynaecologist
Imperial W12 0HS