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In defence of mandatory bicycle helmet legislation: response to Hooper and Spicer
  1. Paul Biegler1,
  2. Marilyn Johnson2
  1. 1Monash University—Centre for Human Bioethics, Melbourne, Victoria, Australia
  2. 2Department of Civil Engineering, Monash University—Institute of Transport Studies, Melbourne, Victoria, Australia
  1. Correspondence to Dr Paul Biegler, Monash University—Centre for Human Bioethics, Building 11, Clayton, Melbourne, VIC 3800, Australia; paul.biegler{at}monash.edu

Abstract

We invoke a triple rationale to rebut Hooper and Spicer's argument against mandatory helmet laws. First, we use the laws of physics and empirical studies to show how bicycle helmets afford substantial protection to the user. We show that Hooper and Spicer erroneously downplay helmet utility and that, as a result, their attack on the utilitarian argument for mandatory helmet laws is weakened. Next, we refute their claim that helmet legislation comprises unjustified paternalism. We show the healthcare costs of bareheaded riding to pose significant third party harms. It follows, we argue, that a utilitarian case for helmet laws can be sustained by appeal to Mill's Harm Principle. Finally, we reject Hooper and Spicer's claim that helmet laws unjustly penalise cyclists for their own health-affecting behaviour. Rather, we show their argument to suffer by disanalogy with medical cases where injustice may be more evident, for example, denial of bypass surgery to smokers. We conclude that mandatory helmet laws offer substantial utility and are entirely defensible within the framework of a liberal democracy.

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