Cyclists who wear helmets are more likely to be knocked down by passing vehicles, research suggests. A study found that drivers tended to pass closer when overtaking cyclists wearing helmets than those who were bareheaded, by 8.5cm on average.
Dr Ian Walker, a lecturer at Bath University, used a bike fitted with a computer and an ultrasonic distance sensor to analyse 2,500 overtakings in Salisbury and Bristol. He was struck twice during the experiment, by a bus and a lorry, while wearing a helmet.
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