The Stationary Brick Wall That Is Moving At 58 MPH

from the pretty-fast-for-a-wall dept

Bob Dole writes "Cameras never lie, right? Well, if they don't then someone needs to explain how brick walls can move at 58 MPH and stationary cars can be clocked at 4 MPH. A British laser expert explains that if a laser speed gun operator's hand slips while measuring speed, it can add (or subtract) significantly to the speed measurement. The accuracy of speed cameras has long been an issue in Europe and Australia. Now there's some science to back up the skepticism." Reminds me of the old joke that people say whenever they get into an accident with stationary objects: "it hit me." Well, if a stationary wall can go 58 MPH, I guess it can jump out and hit a car as well...

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  1. identicon
    The Arbiter, 22 Dec 2008 @ 6:34am

    Re: Re: No Subject Given

    So sorry, not true. The vibrational characteristics of the RADAR mount are irrelevant. Traffic RADAR measures the frequency shift between two objects where there is relative motion between them. The vibration is not a factor.

    Also, RADAR, being a high frequency radio wave, operates at the speed of light. The "calculation" is completed almost instantaneously. RADAR is not affected by the "vibration" of the mount....no matter what it is mounted on.

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