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tonik Lifetime Member
Joined: Mar 02, 2006 Posts: 56 Location: Derbyshire
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Posted: Thu Dec 01, 2011 5:26 pm Post subject: Variable Speed Cameras |
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Do the Variable Speed Cameras work when no limit is being shown on the gantry. An example of this is between Junction 26 & Junction 28 M1. When the gantries are not showing a speed limit I am being passed at speeds well in excess of 70m.p.h. |
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253 Lifetime Member
Joined: Mar 05, 2007 Posts: 1058 Location: The green bit between the M40, M4 and M25.
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Posted: Thu Dec 01, 2011 6:45 pm Post subject: |
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As far as I know, they only work when the signs are activated - when they are showing a speed limit. _________________ Triumph Tbird 1700. And now a Bonnie T100. |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Thu Dec 01, 2011 8:24 pm Post subject: |
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General consensus if that they are switched off when the matrix signs are off.
But we regularly hear press reports where the powers that be say they MIGHT be switched on in specific areas. _________________ "Settling in nicely" ;-) |
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DennisN Tired Old Man
Joined: Feb 27, 2006 Posts: 14901 Location: Keynsham
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Posted: Thu Dec 01, 2011 8:38 pm Post subject: |
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My personal belief is that they are active, but at National Speed Limit, 70mph. Why would they waste them? I can't see that it costs them much to run them, for the return the fines would give them. Just a man in an office presses the button to switch the speed to 70. _________________ Dennis
If it tastes good - it's fattening.
Two of them are obesiting!! |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Thu Dec 01, 2011 9:16 pm Post subject: |
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But how does that explain all the reports from people who see dozens of cars speeding past them, which are being ignored by the cameras??
I'd always thought they were left off when the signs weren't in use because the film would run out too quick; and it would be embarrassing to have to admit how many people manage to drive safely at 80.
But are they even film now?
They do LOOK like old-fashioned Gatsos. If they were digital, wouldn't they look smaller and neater like Monitrons? _________________ "Settling in nicely" ;-) |
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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: Thu Dec 01, 2011 9:22 pm Post subject: |
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My understanding is that that to convert the standard Gatso to a digital one, they replaced the camera and added a slave flash nearer to the first flash area. The box looks the same Here |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Thu Dec 01, 2011 9:29 pm Post subject: |
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Andy_P wrote: | But how does that explain all the reports from people who see dozens of cars speeding past them, which are being ignored by the cameras?? |
I think they're off but the argument about cars whizzing past them means nowt. The amount of cars I see steaming through SPECS 50 zones on the M3 near me is frightening. There are clearly many who have yet to grasp what an average speed zone actually is! _________________ Darren Griffin |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Thu Dec 01, 2011 9:32 pm Post subject: |
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Darren wrote: | Andy_P wrote: | But how does that explain all the reports from people who see dozens of cars speeding past them, which are being ignored by the cameras?? |
I think they're off but the argument about cars whizzing past them means nowt. |
Surely it does if you don't see any flashes?
Apart from Truvelos, they all still work with a visible light flash don't they? _________________ "Settling in nicely" ;-) |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Thu Dec 01, 2011 9:38 pm Post subject: |
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Yes sorry, I'm thinking of SPECS for some reason! _________________ Darren Griffin |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Thu Dec 01, 2011 9:49 pm Post subject: |
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Snow blindness? _________________ "Settling in nicely" ;-) |
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MaFt Pocket GPS Staff
Joined: Aug 31, 2005 Posts: 15258 Location: Bradford, West Yorkshire
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Posted: Thu Dec 01, 2011 10:45 pm Post subject: |
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Andy_P wrote: | But how does that explain all the reports from people who see dozens of cars speeding past them, which are being ignored by the cameras?? |
It could be simply an artefact of inaccurate car speedo's? Driver assumes they are doing 70mph by car speedo. They are in fact doing 65. A car shoots past at what must seem like 80mph but in fact it is 75. The camera is set to the recommended 10% + 2mph so would not trigger until 77mph. 77mph in real speed may actually be 84-85mph on a drivers speedo hence we see no apparent captures.
MaFt |
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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 Dec 02, 2011 12:44 am Post subject: |
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I would have thought that Andy_P knows all about speedo accuracy and 10% + 2mph |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Fri Dec 02, 2011 1:29 am Post subject: |
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Well I'm not saying that I:
1. ignore my speedo and use the TomTom speed display, or
2. Always drive at +10%+2,
...but even if I was, I reckon I'd still see plenty of cars whizzing past me under the gantry cameras. _________________ "Settling in nicely" ;-) |
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Kremmen Pocket GPS Verifier
Joined: Mar 03, 2006 Posts: 7123 Location: Reading
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Posted: Fri Dec 02, 2011 7:22 am Post subject: |
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Andy_P wrote: | But how does that explain all the reports from people who see dozens of cars speeding past them, which are being ignored by the cameras??
I'd always thought they were left off when the signs weren't in use because the film would run out too quick; and it would be embarrassing to have to admit how many people manage to drive safely at 80.
But are they even film now?
They do LOOK like old-fashioned Gatsos. If they were digital, wouldn't they look smaller and neater like Monitrons? |
Exactly !
M25 Western section frequently has speeders, whatever the signs display. There are too many speeders for them to be active otherwise I'd be seeing people slowing down, once bitten, etc.
I've mentioned before the one on the M25 just before the M4 junction clockwise. Always shows 40mph on Thu Fri due to the 3 outside lanes being 'choca' but the inside 3 are fairly clear so 50-60 it is with all the others and I've never had a NIP - yet _________________ DashCam:
Viofo A119 V3 |
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tonik Lifetime Member
Joined: Mar 02, 2006 Posts: 56 Location: Derbyshire
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Posted: Fri Dec 02, 2011 9:11 am Post subject: |
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Thanks guys. Just wondered, as majority of vehicles pass me when I make sure I'm only doing 70ish as I pass them |
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