Pairs of rubbery wires across the road
Discussion
I've seen quite a few of these setups recently. Obviously for measuring speed and logging the data in the box at the roadside. Now there's one just down the road, but positioned near a junction, with the result that most vehicles logged will be moving at less than 15mph as they slow for the turn, or are just into second gear having pulled out. Could it be that some bright spark at the council is going to use the data and the 85th percentile nonsense to get another 20mph zone introduced? Should I spend a few hours a day driving up and down at 30mph over the wires?
They will be counting the number of cars in an hourly period and the speed so they can work out averages. They have a certain criteria for carrying out certain road safety 'improvements'. There was one at the top of our road a few years back and you can write to the Highways Department and get a copy. Makes quite interesting reading. If you are thinking of buying a house on a busy road it is usually worth contacting the Local Authority to see if any of these surveys have been done.
Big_M said: They will be counting the number of cars in an hourly period and the speed so they can work out averages. They have a certain criteria for carrying out certain road safety 'improvements'.
As I thought. I wonder what improvements they have in mind. Presumably the positioning of the wires has been chosen so as to generate the data they think is needed to justify the expense of some traffic calming scheme. Meanwhile all the potholes in the area just get bigger.
For the full lowndown see here
www.ukspeedtraps.co.uk/frames.htm
On the menu bar look for the section on Speed Traps Non Radar/Laser.
Under this click on DS 2 (tru velo)
Depending on the number of cables then some vandalisation will be required. Unless you like scameras that is.
If you've got three cables then get the hacksaw out.
If only one or two cables then its just traffic counting.
But as someone has said it could be that the council are looking to fit you up with some traffic calming. (otherwise known as traffic infuriating
)
Hope this helps
Andy
www.ukspeedtraps.co.uk/frames.htm
On the menu bar look for the section on Speed Traps Non Radar/Laser.
Under this click on DS 2 (tru velo)
Depending on the number of cables then some vandalisation will be required. Unless you like scameras that is.
If you've got three cables then get the hacksaw out.
If only one or two cables then its just traffic counting.
But as someone has said it could be that the council are looking to fit you up with some traffic calming. (otherwise known as traffic infuriating
) Hope this helps
Andy
2 can counts numbers and your speed, 1 counts just numbers.
They are a simple embedded controller with flash memory that is used for traffic monitoring - saves employing people with silly yellow bibs standing around on corners.
They are often used just before a major set of traffic lights to measure the effects on different phasing - if you've got TL's down the end of the road then that is prob. what they are for. The two that I have regularly gone over are the ones that they put around hanger lane, and the second around purley cross - both a few months later have resulted in significant changes to the light phasing and a serious improvement to the traffic throughput (if you compare before/after of hanger lane about 8 years ago, and purley cross about 6 months ago you'll know what I mean...)
It's possible to read them in real time - but not as reliable (due to the "rubberness" of them and the small spacing). I'm not aware of them being used as speed detection for prosectution but someone may correct me.
The rubber is just actually a tube with air in it - the squeezing of the tube by the cars tyres creates a pressure build up that is measured in the "box" at the side of the road by a simple pressure switch.
J
They are a simple embedded controller with flash memory that is used for traffic monitoring - saves employing people with silly yellow bibs standing around on corners.
They are often used just before a major set of traffic lights to measure the effects on different phasing - if you've got TL's down the end of the road then that is prob. what they are for. The two that I have regularly gone over are the ones that they put around hanger lane, and the second around purley cross - both a few months later have resulted in significant changes to the light phasing and a serious improvement to the traffic throughput (if you compare before/after of hanger lane about 8 years ago, and purley cross about 6 months ago you'll know what I mean...)
It's possible to read them in real time - but not as reliable (due to the "rubberness" of them and the small spacing). I'm not aware of them being used as speed detection for prosectution but someone may correct me.
The rubber is just actually a tube with air in it - the squeezing of the tube by the cars tyres creates a pressure build up that is measured in the "box" at the side of the road by a simple pressure switch.
J
Police use a system called 'ARCHER' which has two cables running across the full width of the road. The cables send information on traffic speed to a grey box usually chained to a lamp post or something substantial.
The box looks about the same size as a large brief case and the data collected is used to assess whether there is a need to place .....
you've guessed it, a speed camera!
The cables that used to go half way across the road were a primative system of Truvello. They ran into the back of an unmarked Police vehicle where the truvello device was situated, the operator calling the speeds and vehicles out to a catch team 1/2 mile further down the road. They are not used anymore!
The box looks about the same size as a large brief case and the data collected is used to assess whether there is a need to place .....
you've guessed it, a speed camera! The cables that used to go half way across the road were a primative system of Truvello. They ran into the back of an unmarked Police vehicle where the truvello device was situated, the operator calling the speeds and vehicles out to a catch team 1/2 mile further down the road. They are not used anymore!
I tried the handbrake thing, and it NEVER does anything...
The appearance of twin & triple tubes on some of my favourite NSL roads triggered my suspicion that it would become an ideal place for a Talivan to lurk. Hence the need to reduce v-max to be within 25mph of the posted limit.
Be worried when you see 'em. It only means trouble.
C
The appearance of twin & triple tubes on some of my favourite NSL roads triggered my suspicion that it would become an ideal place for a Talivan to lurk. Hence the need to reduce v-max to be within 25mph of the posted limit.
Be worried when you see 'em. It only means trouble.
C
It would seem feasible to assume that they measure speed by measuring the time it takes between hitting the first strip and the second - if they measure the distance before installing, it should be reasonably accurate - eg Speed = Distance / Time.
Assumably theyre not accurate enough to actually prosecute anyone, otherwise id imagine there would be a camera linked up to them - but as a 'roughly accurate' device to measure the average speed on that bit of road at various times of the day, it should work quite well.
As for the handbrake thing - what about clouting one with a large axe? Would the person get electrocuted or do they not carry any electricity?
Assumably theyre not accurate enough to actually prosecute anyone, otherwise id imagine there would be a camera linked up to them - but as a 'roughly accurate' device to measure the average speed on that bit of road at various times of the day, it should work quite well.
As for the handbrake thing - what about clouting one with a large axe? Would the person get electrocuted or do they not carry any electricity?
madcop said: Police use a system called 'ARCHER' which has two cables running across the full width of the road. The cables send information on traffic speed to a grey box usually chained to a lamp post or something substantial.
The box looks about the same size as a large brief case and the data collected is used to assess whether there is a need to place .....
The cables that used to go half way across the road were a primative system of Truvello. They ran into the back of an unmarked Police vehicle where the truvello device was situated, the operator calling the speeds and vehicles out to a catch team 1/2 mile further down the road. They are not used anymore!
I had been under the impression that safety statistics, not traffic speed, were the criteria for siting new cameras.
Mon Ami Mate said:
I had been under the impression that safety statistics, not traffic speed, were the criteria for siting new cameras.
Its all linked together.
Residents complain about speeds of vehicles past their houses,
Traffic management units are tasked to obtain data to see the extent of the problem. If there appears to be a problem (from information of residents backed up by data), then the relevent measures are employed to address the problem.
Prevention rather than cure.
They do measure vehicle speed, believe me!
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