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Jarvis2323@programming.dev ⁨4⁩ ⁨days⁩ ago

These cameras do nothing to improve safety. There is no meaningful scientific evidence that shows any difference improvement in safety.

Their only value is socioeconomic harm.

“after accounting for MVC increases in the control segment we found that neither camera placement nor removal had an independent impact on MVCs. In other words, speed cameras did not statistically contribute to an increase or decrease in the number of MVC.”

www.ncbi.nlm.nih.gov/pmc/articles/PMC3861844/#:~:….

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TheTechnician27@lemmy.world ⁨4⁩ ⁨days⁩ ago
Your own study links to a Cochrane systematic review which states the following:

Despite the methodological limitations and the variability in degree of signal to noise effect, the consistency of reported reductions in speed and crash outcomes across all studies show that speed cameras are a worthwhile intervention for reducing the number of road traffic injuries and deaths. However, whilst the the evidence base clearly demonstrates a positive direction in the effect, an overall magnitude of this effect is currently not deducible due to heterogeneity and lack of methodological rigour. More studies of a scientifically rigorous and homogenous nature are necessary, to provide the answer to the magnitude of effect.

You linked a study that took place along a single 26-mile stretch of road in Arizona, and while it does some good toward controlling for confounding variables, but a single, highly localized study simply isn’t as robust as a Cochrane systematic review.

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- Jarvis2323@programming.dev ⁨4⁩ ⁨days⁩ ago
  It focused on the Arizona study because that was the only one out of the 35 that actually measured Motor Vehicle Collisions. The rest did not even attempt it in any controlled manner.
  
  As stated, there are no meaningful studies that these cameras reduce accidents.
  
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  - TheTechnician27@lemmy.world ⁨4⁩ ⁨days⁩ ago
    So it sounds to me like you’re not disputing the fact that they have a protective effect against injury and death. Maybe you should clarify that in your prior comment if that’s how you feel.
    
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    Jarvis2323@programming.dev ⁨4⁩ ⁨days⁩ ago
    I am in fact stating that there is no proof that they do anything to reduce collusions or deaths. I stated in my first comment that such proof does not exist.
    
    These cameras are only deployed to generate revenue. There is no scientific basis for improved safety.
    
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undergroundoverground@lemmy.world ⁨4⁩ ⁨days⁩ ago

A recent Cochrane review examining 35 studies investigating the effect of speed cameras on speed and collisions concluded that although the quality of the studies was moderate at best, the consistency of all studies to report a positive reduction in either speed or collisions was impressive

That’s 35 for and one against, due to heavily manipulating no less than 5 different variables, in order to force themselves to have to conclude that speed cameras don’t improve safety.

Read your links folks!

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