Truvelo question
Discussion
The Truvelo nabs people using sensors in the road, and the corroborating evidence is the photograph. The photo is timed so that the vehicle setting off the detector has its front wheels squarely on a set of lines crossing the road.
Near where I work there is a Truvelo in a 30mph limit covering 2 lanes that carry traffic in the same direction. It is entirely feasible that one vehicle could set off the sensor, while overtaking a slower vehicle which then by chance also has its front wheels on the set of corroborating lines when the photo is taken. The photograph would seem to imply that both vehicles were speeding, although in fact it could be either and there is no way to prove which it was.
Does anyone know what procedure is followed for this exceptional case? I'm guessing that as the evidence cannot determine which vehicle is speeding the photo has to be binned and NFA. I can't imagine that 2 NIPs get sent out.
Near where I work there is a Truvelo in a 30mph limit covering 2 lanes that carry traffic in the same direction. It is entirely feasible that one vehicle could set off the sensor, while overtaking a slower vehicle which then by chance also has its front wheels on the set of corroborating lines when the photo is taken. The photograph would seem to imply that both vehicles were speeding, although in fact it could be either and there is no way to prove which it was.
Does anyone know what procedure is followed for this exceptional case? I'm guessing that as the evidence cannot determine which vehicle is speeding the photo has to be binned and NFA. I can't imagine that 2 NIPs get sent out.
turbobloke said:
There you go, easy wasn't it
Sorry, couldn't find the tongue-rammed-firmly-in-cheek smiley
Seriously though, if 2 NIPs get sent out routinely, then EVERYONE who gets zapped should ask for the photo. IANAL (clearly!) but the photo in this hypothetical case proves only that at least one of the vehicles was speeding, not which one. Surely it's inadmissible?
moosepig said:No worries I knew what you were getting at
Sorry, couldn't find the tongue-rammed-firmly-in-cheek smiley
Again, seriously, the photos are not routinely checked, not always checked. There have been some absolutely inexplicable attempts at daylight robbery, spectacular boobs. But that's another thread...
I believe the same two pairs of pressure sensors are shared across all enforced lanes (in the direction of travel). If two vehicles, travelling at different speeds, end up with their front wheels being side by side within the 3 confirmation lines, it would mean that the slower vehicle had crossed all the pressure sensors first; hence the speed measured by the sensors will be that of the slower vehicle. Signals received immediately after the fist one from each sensor must be discarded otherwise the signals from slower cars could be misinterpreted and a higher speed falsely deduced.
I personally have watched a Truvelo (Mile End Road, Portsmouth – enforces 4 lanes) remain untriggered by vehicles which were obviously well above the trigger limit when the offender is in traffic (please don’t try this out for yourself)
I personally have watched a Truvelo (Mile End Road, Portsmouth – enforces 4 lanes) remain untriggered by vehicles which were obviously well above the trigger limit when the offender is in traffic (please don’t try this out for yourself)
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