L Posted 31 October, 2008 Posted 31 October, 2008 How do they work? Do they take a shot of you through the first one and then through the last one and work out your average speed from how long it took you to get through or is it just an average of your speed through the cameras ie. if i did 50 through the first camera then sped up to 80 but slowed down to 50 to go through the last camera my average was clocked at 50? anyone know?
Son of Bob Posted 31 October, 2008 Posted 31 October, 2008 I like the way that they put cameras on the slip road to the services. Stops people driving like a nob, stopping for a coffee, and carrying on!
saint_stevo Posted 31 October, 2008 Posted 31 October, 2008 The ones on the M40 aren't. the ones on the M27 are though
St Landrew Posted 31 October, 2008 Posted 31 October, 2008 they are fakes It's simple, It calculates the time you take to go through each camera. If you speed up between it knows And the cameras would be linked and have timings on the shot. Simple visual proof. Although in this case, I'm inclined to agree with ol' Visage himself.
saint_stevo Posted 31 October, 2008 Posted 31 October, 2008 And the cameras would be linked and have timings on the shot. Simple visual proof. Although in this case, I'm inclined to agree with ol' Visage himself. Visage?
Guest Dark Sotonic Mills Posted 31 October, 2008 Posted 31 October, 2008 Visage? Your avatar... It's Steve Strange, singer with the band Visage.
CabbageFace Posted 31 October, 2008 Posted 31 October, 2008 the ones on the M27 are though Lol, who told you that? They are working and alot of people have been own'd by them
Al de Man Posted 31 October, 2008 Posted 31 October, 2008 Lol, who told you that? They are working and alot of people have been own'd by them My understanding was they are real, but only a couple of people have been caught unless that was the ones that used to be between Fareham and Portsmouth.
Gemmel Posted 31 October, 2008 Posted 31 October, 2008 They don't work if you change lane. Jeremy Vine interviewed some road minister (Or another silly title) and asked him if it was true that they only work if you stay in same lane, the guy admitted it was and Vine burst out laughing
L Posted 31 October, 2008 Author Posted 31 October, 2008 They don't work if you change lane. Jeremy Vine interviewed some road minister (Or another silly title) and asked him if it was true that they only work if you stay in same lane, the guy admitted it was and Vine burst out laughing Lol that's brilliant. Very well thought through obviously.
Minty Posted 31 October, 2008 Posted 31 October, 2008 (edited) It is not the cameras themselves that only work if you stay in the same lane, but the Home Office approval for them... when they were certified the design spec was for cameras that monitored one lane only... therefore they were given approval on meeting that requirement. So, a legal prosecution can only be made for same-lane infringements. Others could be challenged and rejected because of the approval given to the cameras. But there are circumstances where prosecutions can be made so it's not black and white. The actual technology can easily capture cars across all three lanes. It works on number plate recognition, and times the difference between capture of a registration at any pair of cameras. The same technology that is now used in many car parks to catch people who don't buy a ticket. Irrespective of all that, the amount of drivers who clearly don't understand the meaning of the word 'average' never ceases to amaze me though. Slowing down when they see a camera and then speeding up again. Retards. Edited 31 October, 2008 by Minty
L Posted 31 October, 2008 Author Posted 31 October, 2008 Irrespective of all that, the amount of drivers who clearly don't understand the meaning of the word 'average' never ceases to amaze me though. Slowing down when they see a camera and then speeding up again. Retards. Which was my first question. Average speed through the cameras or average speed for the stretch of road? Both examples would give an average reading.
Minty Posted 31 October, 2008 Posted 31 October, 2008 (edited) A single fixed camera cannot record an average speed without reference marks (hence white lines painted on the road for traditional flash cameras). They take two pictures at specified intervals and then work out your speed accordingly... that's pretty much an 'instant' speed. OK, so you could argue that it's an average speed over the distance of the markers on the road, but they cover about 25m maximum. The only way a single camera can record an average speed is if it is of the mobile type used by police that uses a reflected beam to measure the speed at which you are moving towards or away from the camera, and hence needs to be moved to follow the car. So as you'll have worked out, the average speed cameras such as those on the M27 measure the speed between the two cameras, and therefore over that stretch of road. Edited 31 October, 2008 by Minty
OLYMPIC Posted 1 November, 2008 Posted 1 November, 2008 Another good reason to have a Bike the cameras are forward facing and no numberplate on the front of a bike. Unless you ride like that knob in the Echo a few weeks ago who kept doing wheelies or speeding past the same camera.
Al de Man Posted 1 November, 2008 Posted 1 November, 2008 Another good reason to have a Bike the cameras are forward facing and no numberplate on the front of a bike. Unless you ride like that knob in the Echo a few weeks ago who kept doing wheelies or speeding past the same camera. Yeah, I followed a bike out of town this week and he was quite happy to set off the Truvelo camera at the top of Maybray King Way.
saint_stevo Posted 1 November, 2008 Posted 1 November, 2008 Your avatar... It's Steve Strange, singer with the band Visage. Oh, i thought it was boy george understanding the irony now
TopGun Posted 2 November, 2008 Posted 2 November, 2008 A single fixed camera cannot record an average speed without reference marks (hence white lines painted on the road for traditional flash cameras). They take two pictures at specified intervals and then work out your speed accordingly... that's pretty much an 'instant' speed. OK, so you could argue that it's an average speed over the distance of the markers on the road, but they cover about 25m maximum. The only way a single camera can record an average speed is if it is of the mobile type used by police that uses a reflected beam to measure the speed at which you are moving towards or away from the camera, and hence needs to be moved to follow the car. So as you'll have worked out, the average speed cameras such as those on the M27 measure the speed between the two cameras, and therefore over that stretch of road. I was under the impression with a Gatso cam that the roadmarkings were merely an added corrolary to an already acceptable 2 cam shot at a very short fixed interval.
Ponty Posted 2 November, 2008 Posted 2 November, 2008 I was under the impression with a Gatso cam that the roadmarkings were merely an added corrolary to an already acceptable 2 cam shot at a very short fixed interval. Correct, the camera doesn't need any markings to determine the speed but to be prosecuted for it there need to be visible markings on the road as a comparitor.
Minty Posted 3 November, 2008 Posted 3 November, 2008 My point was more about the 'instant' speed reading, versus an average over some distance, rather than the specific technology but apologies if I gave that impression.
John Boy Saint Posted 3 November, 2008 Posted 3 November, 2008 Irrespective of all that, the amount of drivers who clearly don't understand the meaning of the word 'average' never ceases to amaze me though. Slowing down when they see a camera and then speeding up again. Retards. And those same numpties cause the traffic to stop 2 miles back in the roadworks for no reason. The Dutch bloke Mr Gatso invented the speed cameras for motor racing purposes, but then the Dutch authorities realised that it could be used to police speeding motorists on the open road. Mr Gatso's best friend got prosecuted after being caught on one of them and never spoke to him again
CabbageFace Posted 4 November, 2008 Posted 4 November, 2008 They don't work if you change lane. Jeremy Vine interviewed some road minister (Or another silly title) and asked him if it was true that they only work if you stay in same lane, the guy admitted it was and Vine burst out laughing This is also a lie.
Gemmel Posted 5 November, 2008 Posted 5 November, 2008 This is also a lie. See Mintys response under mine which gives a but more detail, but this was as confirmed on radio with vine and some transport guy.
CabbageFace Posted 7 November, 2008 Posted 7 November, 2008 See Mintys response under mine which gives a but more detail, but this was as confirmed on radio with vine and some transport guy. Considering i have been on endless seminars and expo's showing off these camera's i can confirm the newer ones can detect a car moving lanes.
Scummer Posted 7 November, 2008 Posted 7 November, 2008 Considering i have been on endless seminars and expo's showing off these camera's i can confirm the newer ones can detect a car moving lanes. Minty said the cameras can detect it, that's not the issue.
Gemmel Posted 8 November, 2008 Posted 8 November, 2008 Considering i have been on endless seminars and expo's showing off these camera's i can confirm the newer ones can detect a car moving lanes. Did you forget to go on the seminar that talked about the licensing agreement and what the home office approved them for ?
Al de Man Posted 9 November, 2008 Posted 9 November, 2008 I went past the first camera at Rownhams shielded by an articulated lorry, so continued up to the second camera by the services with aplomb.
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