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RobBrady
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Joined: Jul 21, 2004
Posts: 2718
Location: Chelmsford, UK
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 Posted: Tue Jan 13, 2009 7:17 pm Post subject: Frost Throttles Dutch Speed Cameras |
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According to DutchNews.nl, the Dutch language newspaper Telegraaf reports today that motorists caught by speed cameras during a heavy frost have a good chance of getting their tickets annulled because some machines may prove unreliable in low temperatures.
David Stam of the weights and measures institute NMI tells the Telegraaf "If an instrument is approved to work in a maximum low temperature of -10 Celsius then it should not be used if it is colder".
The paper reports that Dutch speed cameras are certified to work accurately in temperatures between -10 and +40 Celsius.
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pcaouolte
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Joined: Dec 27, 2006
Posts: 998
Location: South Lincs, UK.
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| Posted: Tue Jan 13, 2009 8:52 pm Post subject: |
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Is there any way of finding out what the usable range of the UK cameras is?
Assuming we went for the cheapest possible technology it might be between 20 and 21 degrees? 
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zbmb90
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Location: Hertford
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| Posted: Tue Jan 13, 2009 9:44 pm Post subject: |
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| My son got caught for speeding in Belgium at the weekend. Does anyone have any idea if the same applies to Belgian cameras? |
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RobBrady
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Location: Chelmsford, UK
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| Posted: Wed Jan 14, 2009 7:53 pm Post subject: |
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| Quote: | | In 2007, a UK motorist asked the Avon and Somerset Speed Camera Partnership for any documentation regarding the operating temperatures in which the area's speed cameras were certified to operate. Officials responded that they did not know the answer. |
| Quote: | | US speed camera and red light camera equipment is also affected by temperature swings. While some components boast recommended operating temperatures as low as -4 to -13 degrees Fahrenheit, such as the radar units manufactured by AGD and used by Redflex speed vans, others are less tolerant of cold weather. Brochures for the Australian company's laser-based mobile speed camera product list an operating temperature range of 32 to 122 Fahrenheit. |
From TheNewspaper.com
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Philip
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Joined: 12/09/2002 14:25:05
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Location: Hampshire, United Kingdom
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| Posted: Wed Jan 14, 2009 8:49 pm Post subject: |
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While I have absolutely no problem with people exceeding the legal speed limit (and possibly by a significant margin) when conditions are safe to do so, I struggle to think of anywhere that it would be safe to exceed the posted limit in "heavy frost" with temperatures of -10 degrees!
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mikealder
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Joined: Jan 14, 2005
Posts: 19638
Location: Blackpool , Lancs
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| Posted: Wed Jan 14, 2009 8:57 pm Post subject: |
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Consider though what could happen, someone driving safely and within the speed limit past a camera that isn't designed to work in extreme cold temperature.....
Camera Flashes, takes the picture and you get a fine and points when driving well below the limit.
If a device isn't specified, designed or even tested to ensure it works below certain temperatures then it is a possible "get out of jail card" although I have never heard of such a counter claim against a speeding ticket being used - Mike |
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Shims
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Joined: Nov 18, 2006
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| Posted: Fri Jan 23, 2009 10:23 pm Post subject: Speed camera and temperature |
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It might be worth finding out if a wind chill factor would need to be applied as well, sometimes the air temperature and the actual temperature can be quite a few degrees out due to the winds or perhaps this wouldn't make much difference but i was thinking of those little weather station box's that have to have the thermometer in exacly the rigt position to be accurate. Those cameras do sit inside a big metal box that must act like a fridge..and on mount well away from any protection.
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M8TJT
The Other Tired Old Man
Joined: Apr 04, 2006
Posts: 10118
Location: Bexhill, South Sussex, UK
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| Posted: Fri Jan 23, 2009 11:52 pm Post subject: Re: Speed camera and temperature |
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| Shims wrote: | | It might be worth finding out if a wind chill factor would need to be applied as well |
I think that you will find that wind chill affects people not things. It's a 'feels colder' than it actually is thing, and things don't feel. 
| Shims wrote: |
Those cameras do sit inside a big metal box that must act like a fridge.
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Doesn't seem likely, as they have electronic gubbins inside that are likely to raise the internal temperature above the outside ambient temperature.
However, with the sun beating down on the box, the internal temperature is likely to be well above ambient unless the box is very well ventilated.  |
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