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Anonymous

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James Sharpe  says:

Speed cameras inaccurate in cold weather?

Motorcyclists caught speeding during the cold snap earlier this year could soon have grounds to appeal, after car driver Andrew Fowler embarked on a landmark case to prove the readings from Gatsos could be wrong in sub-zero temperatures. Fowler, 48, was clocked doing 41mph in a 30mph zone in Cambridge in February last year, but was sure his speedometer was reading...

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  • Posted 5 years ago (28 May 2010 12:25)

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SlowLearner

Joined:

Feb 10

Posts: 1953

SlowLearner says:

Clocks

At just five degrees below, I'd be rather surprised to see the internal clock be that far out.  Try putting your digital watch outside when it's that cold (I wouldn't recommend putting it in a freezer at -18) for a few hours, it's not going to lose many seconds.


Granted, if the internal clock was slow, it would make the distance apparently travelled between two flashes look greater.  But it would have to be operating a lot slower to make 30 mph look more like 40 mph.

In fact, you'd have to expect your digital watch, or the digital clock on a bike/car for that matter, to lose 10 minutes every 40 minutes.  Anyone notice their bike/car clock lose that much time over winter?

For that matter, the digital speedometer on the bike is just measuring distance in a given time and making calculations.  If anyone was hardy enough to ride in -5 degree weather, the clocks would have showed 30mph when actually doing 40mph.  Anyone notice anything like that?

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steven.hood7

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Jan 08

Posts: 283

steven.hood7 says:

Just A Thought !

Surely the first flash taking place is proof enough of speeding? And the second flash is to fix the speed !Whether the second flash is delayed by sub-zero temperatures or not an offence has taken place.

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SlowLearner

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Feb 10

Posts: 1953

SlowLearner says:

Flash

I wondered about that too, Steven.Hood, but the argument would probably be that if the timing of the flash was out, the timing mechanism of the detector that initiated the flash would also be out!

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cockyjocky

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May 10

Posts: 3

cockyjocky says:

What a load of rubbish!

 

Capacitors not holding charge???? He's talking out of his ar$e!

 

Gatso cameras will work regardless of any temperature we are likely to encounter in this country. FFS, Gatso cameras are in use in places like Norway and Sweden without any problems.

 

Grow some balls and admit you were speeding you idiot!

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Sedgepeat

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May 10

Posts: 1

Sedgepeat says:

No rubbish

Simple fact is that like your speedo, no camera can see accident causes and physics would not support the idea that to go above any number will cause an accident any more than not to won't. So the debate is academic. These things cannot stop one single accident. Why aren't they built and installed just for cost if its all about saving lives? Follow the money!

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Yellowninja600

Joined:

Nov 07

Posts: 540

Well...

Good ole expansion and contraction eh?

 

They should simply admit that speed cameras haven't saved any lives and have been a massive failure as far as road safety is concerned. Between cameras and bloody speed humps I just don't know where these idiots get their ideas anymore...

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FellRaven

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Apr 10

Posts: 109

FellRaven says:

Loop Hole

I think the case won't be so much about the accuracy of the reading, as if I remember correctly Gatsos perform two speed checks.The first is a radar which measures the doplar shift in the returning signal the second is distance travelled. I guess both of these could be effected by issues with the timing depending how the doplar shift is measured, the the capacitor would be a red herring. Now the defence is more likely to be simply that the equipment is not being operated in accordance with the manufacturers instruction. This isn't about whether you were speeding it's about whether the gatso can be used in evidence

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arryace

Joined:

Apr 10

Posts: 198

arryace says:

not again

this isnt the first time MCN has suggested everyones points will be removed it didn't happen last time.

the Gatso was invented in the netherlands in winter they get freezing temperatures the system and componenets used will have a working temperature range it would have been very short sited if this didn't include sub-zero temps.

IMO anyone caught speeding on their bike when it is -5 deserves a medal!!!

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HOSBUSA

Joined:

Sep 09

Posts: 406

HOSBUSA says:

Wouldnt be the first time a scamera has been innacurate/ faulty. Trouble is they refuse to give you the evidence when asked. You`re either guilty or more guilty.

So many test cases have failed in the way scameras are used illegally, against human rights and against the principles of UK Law (Innoocent until proven guilty) against all logic and reason. Because they are way too much of an earner for governments !

When big money comes into play, the laws of this land become all irrelevant.

 

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SlowLearner

Joined:

Feb 10

Posts: 1953

SlowLearner says:

killahrat:

Given you're an "expert in physics", I'd be most interested in hearing you make an explanation of how you find "that makes perfect sense to me" 


Please detail your reasoning.

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