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Author How speed cameras work
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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3rd Feb 05 at 16:59   View Garage View User's Profile U2U Member Reply With Quote
Just saw how speed cameras work last night, the two pictures are taken then someone sits there and views the images, the amount of notches in the road travelled = how fast you are going, one notch = 5mph, sounds VERY innaccurate to me, what happens if the person miscounts?? or if the notches are slightly innaccurate, or bumps in the road etc.
K2 GTi
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3rd Feb 05 at 16:59   View User's Profile U2U Member Reply With Quote
I watched that too
Steve
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Registered: 30th Mar 02
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3rd Feb 05 at 17:00   View Garage View User's Profile U2U Member Reply With Quote
did u see the copper sat in the van who had points
K2 GTi
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3rd Feb 05 at 17:00   View User's Profile U2U Member Reply With Quote
But if it flashes then you're over the limit, so the speed camera must know...


So why get someone to sit there?
K2 GTi
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3rd Feb 05 at 17:01   View User's Profile U2U Member Reply With Quote
I know, funny bastard! lol
3CorsaMeal
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Registered: 11th Apr 02
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3rd Feb 05 at 17:01   View User's Profile U2U Member Reply With Quote
saw that, surely there's a better way
CRB 553
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3rd Feb 05 at 17:16   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by K2 HOY
But if it flashes then you're over the limit, so the speed camera must know...


So why get someone to sit there?



Because theyt need photographic evidence to back up a prosecution in court! The camera detects the speed of the car using doplar shift(radar) and then the two photgraphs are aken at a precise time interval so by counting the lines they know distance travelled. Speed = distance / time!

The lines are obviously painted precisely on the road otherwise there wudnt be much point. If you see them being painted they not done with a bloke and a brush!
Steve
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Registered: 30th Mar 02
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3rd Feb 05 at 17:19   View Garage View User's Profile U2U Member Reply With Quote
what about if the women miscounts?
Steve
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3rd Feb 05 at 17:25   View Garage View User's Profile U2U Member Reply With Quote
i have seen awfully wonky lines where the road surface is crap before, this cannot be accurate
CRB 553
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3rd Feb 05 at 17:54   View User's Profile U2U Member Reply With Quote
well there will be error margins yeh but not so much that you will be prosecuted for doing under 30. The camera will not flash until approx. 36mph to allow for such errors.
Andrew
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Registered: 5th May 04
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3rd Feb 05 at 18:25   View User's Profile U2U Member Reply With Quote
Sometimes they just flash you for doing under the limit I'm now glad they are manually checked and it's not just an automated system

 
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