Speed Cameras Cost Lives...

Discussion in 'General Discussion' started by st13phil, Oct 26, 2008.

  1. st13phil

    st13phil MB Club Veteran

    Nov 6, 2007
    North Oxfordshire
    His - Denim Blue A220 AMG Line Premium / Hers - Obsidian Black R172 SLK55
    ...well, not exactly, but as an article in The Register notes, the action that Swindon have taken to cease funding the Safety Camera Partnership could result in it being "proven" that speed cameras actually cause accidents.

    This could come about because accidents in the Swindon area have been on the increase over the last couple of years and if, as seems most likely, the upward trend is itself little more than random fluctuation, then removing the cameras could end up being associated with a fall in accidents over the next year or so. Which would neatly "prove" that cameras actually cause accidents. This is what statisticians refer to as "regression to the mean" effect (rtm) and is what the DfT repeatedly ignore when they claim over-inflated benefits from speed cameras.

    As the article notes, it looks like the DfT could be "hoisted by their own petard" if they have to explain why accidents fell after fixed speed cameras were removed :)

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