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Speed Cameras

Speed Cameras

Speed Cameras

Is anyone aware of how reliable speed cameras are at distinguishing between the speeding vehicle and the vehicles that just happen to be at the same position and time in an adjacent lane? Or are they capable at all?

It struck me as somebody was passing me going 80 mph in a construction zone and the camera flashed right as I was next to them.

RE: Speed Cameras

I have thought of this too. I would think that determination of the faster vehicle within the zone could be done by looking at the relative image "blur" of either vehicle. Whether that is or would be done (if at all) by a software algorithm or by I person I couldn't say even though there are quite a few image processing algorithms. If tickets are issued "automatically" both vehicles might get ticketed in hopes that at least one would return a check for the fine. "Guilty by association".

Bruce Youngman

RE: Speed Cameras

IRstuff, excellent point. I replied based on the assumption that both vehicles potentially being within the target sensor FOV. Depending upon approach angles, it might not be clearly defined which vehicle is truly being measured.

Bruce Youngman

RE: Speed Cameras

IR: Your "??" strikes me as you are telling me I am foolish for not knowing the answer. Shame on me, I guess.

RE: Speed Cameras

Not that you didn't know the "answer," but that you didn't apply some cause and effect. The flashing is obviously there so that the cameras can get good images, so by inference, without the lights, the cameras cannot reliably get good images, hence, there must be another sensor involved, which triggers the camera and lights.

Moreover, it took less than 30 seconds of searching to find the cited link, which begs the question why that search hadn't been done before.

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RE: Speed Cameras

I apologize for wasting your time and Eng-Tips server space. :)

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