167 e-Letters

  • "In Montreal, no greater risk on cycle tracks"
    Anne C. Lusk

    We regret the two errors that Kary identified. "What this study adds" should read published crash [not injury] rates (the article body states it correctly), and the Rachel length is 1.7 km [not 3.5]. In Table 1, correcting for 1.7 doubles Rachel's absolute incident rates; however, it raises overall crash and injury rates by only 10% to 9.6 and 11.5, respectively. In Table 2, the relative risk comparison is unaffected sinc...

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  • Flaws in the 2010 Lusk Montreal Study - streets with statistically significant results.
    Ian B Cooper

    1. Rue de Brebeuf Cycle Track vs. Rue St. Denis between Rachel and Laurier.

    These streets are not comparable.

    Brebeuf (which has a cycle track) is a narrow 40kph slow-moving one- way residential street with one traffic lane and one parking lane.

    Rue St. Denis (which has no cycle track) is a six-lane (two lanes often taken up by parking) 50kph limit two-way highway in a commercial area with lot...

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  • Young Drivers
    Ronald A Napier

    The Results of this study are interesting, particularly comparisons to other countries. I'd be also interested in looking into driver license test standards. Having worked as an expat in the UK 1999-2005, I knew many who have tried unsuccessfully to obtain a driver's license because of the high test standards. You must pass a written test, video response test and the road test. Only 30% successfully complete all three on t...

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  • Compendium of errors and omissions, or: What is not in this article
    M Kary

    Injury Prevention asks that responses to articles be kept to less than about 300 words. The volume of errors and omissions in this article by Lusk et al. is so excessive that it took me rather more than that-- including photographs of the actual streets-- just to document them. The result is now hosted on John S. Allen's bicycle pages and can be directly found by searching the internet for e.g. these terms:...

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    Tony H. Reinhardt-Rutland

    Ackery et al (1) show that risk to cyclists in collisions with motor- vehicles increases with the size of the motor-vehicle. This evidence may generalize to other types of collisions: consistent with Ackery et al are studies concerning different sizes of automobile with pedestrians (2,4) and collisions concerning different sizes of automobiles in general (3). One can infer that a smaller entity - both in terms of linear d...

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  • Re:Underscoring the Benefits of Cycle Tracks
    Tony H. Reinhardt-Rutland

    I make brief extra comments in response to Lusk et al.

    It is difficult comparing the poor cycle-specific facilities that I find in Northern Ireland with the lack of cycle-specific facilities typical in the US: neither scenario helps cyclists and any statements about which is to be preferred may never be more than impressionistic.

    However, I would concede that even imperfect cycle-specific facilities pr...

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    Tony H. Reinhardt-Rutland

    Mendivil et al's (1) excellent paper demonstrates the cost-benefits to be derived from investment in speed cameras. It invokes that remarkable Achilles-heel accompanying mass motoring: the toleration of levels of preventable danger that are unacceptable in other transport modes (2).

    Attitudes to speed-cameras may reflect the misplaced suspicion that motorists have long directed to the accuracy of their speedomete...

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  • Updating the international research agenda for sports injury prevention research
    Alex Donaldson

    Dear Editor

    I read with interest Caroline Finch's Online First editorial describing her recent experience of attending and giving a key note address at the third World Conference on Prevention of Injury and Illness in Sport. As someone who also frequently straddles the fields of sports medicine, injury prevention and, more broadly, health promotion, I would like to whole heartedly support Professor Finch's call...

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  • Underscoring the Benefits of Cycle Tracks
    Anne C. Lusk

    We agree with Reinhardt-Rutland's concerns1 about Northern Ireland's poorly designed and policed bicycle facilities but we doubt that the U.S. traditional model of simply treating bicycles as vehicles is better. What works is physically separating bicyclists from fast or heavy motor traffic. Reinhardt-Rutland further suggested that higher fuel costs could effect change where risk assessments have failed. While waiting fo...

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  • Time-exposure drowning rate for swimmers
    Damian Morgan

    Mitchell, Williamson and Olivier's (2010) study estimated drowning rates for the Australian state of New South Wales (NSW) in 2005 based on resident population person-time exposure to swimming. The authors state (p. 261) that "failure to adjust injury rates for exposure to a hazard necessarily results in poor estimates of risk", and based on their findings, conclude (p. 264) drowning mortality rates to be "more than 200...

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