Moose:
I always thought these speed cameras distinguish between cars and trucks by weight, as you can often see a loop cut into the road surface near the camera
there is quite a few about and i cant see it being to much of a problem to distinguish cars/trucks as the m42 has this type of weighbridge in the road surface which vosa use and it can weigh each axle on a truck passing over it at 56 mph then they can pull you futher down for a check round.
the camera outside the belfrey is another, i think its getting to the point that you will have to treat all/most cameras this way as you just cant be sure
moose
That loop is not a WIM (weigh in motion) sensor, it is a inductive loop vehicle sensor, it is basically a coil of wire fitted into the tarmac which detects when a vehicle is passing over it. It is used to stop the camera flashing in error when vehicles come from the opposite direction, its basically just a safety feature to stop people getting blinded by the flash
animal:
If you do get a ticket see if you can go on the speed awareness course will save the point going on your licence & yep Northumbria Police run this course ( no I have not been on it but know several people who have )
what happens on one of those speed awareness shows? is it 8hrs of blood and guts road accidents & A&E with interviews of people who survived?
So, busby, if radar-operating cameras can “flag up” the size of the vehicle, why aren’t there more prosecutions of people driving HGVs in such circumstances as most of them are surely exceeding 40mph and most cameras use radar? Or are most cameras not radar-operated? Or perhaps most HGVs do stick to the prescribed limit when passing a camera just to be safe?
In other words should we really have to drop to 40 every time we see a camera on such a road (not that I exceed the speed limit)?
Snudger:
So, busby, if radar-operating cameras can “flag up” the size of the vehicle, why aren’t there more prosecutions of people driving HGVs in such circumstances as most of them are surely exceeding 40mph and most cameras use radar? Or are most cameras not radar-operated? Or perhaps most HGVs do stick to the prescribed limit when passing a camera just to be safe?
In other words should we really have to drop to 40 every time we see a camera on such a road (not that I exceed the speed limit)?
Not all Gatsos are set up to identify between HGV’s and cars but all gatsos do use radar. Truvelo cameras which are the forward facing cameras do not use radar they use inductive loops in the road to work out the speed. I would always drop my speed, better to be safe than sorry
Ok so here i go looking like a proper geek. The way they tell what kind of vehicle is going passed is by using something called inductive loops or peaso cables. The Truvello cameras that face you have two peaso cables across the road just before the camera. These cant tell what clasification of vehicle it is but measure the time taken to cross the two cables, super fast maths and it knows if you are speeding or not.
Now, some of the ‘Gatso’ type cameras that face away from you will have a square cut into the road just before the camera and there is a special type (its name escapes me) of cable that is looped 4 times around this cut and returned to a control panel. The rest of the cut is filled with a resin. These ‘loops’ can count, measure speed and also state the classification of the vehicle passing over it. So, your doing 47 in a national speed limit, your hgv goes over the loops and it tells the camera that your are a hgv and you then get the fine in the post.
These loops are also used to control traffic lights, entry gates and city centre vehicle counts. Reason I know? I used to install and monitor them and my pre hgv days. Hope this is some help.
Paul Gloria Meadows:
Ok so here i go looking like a proper geek. The way they tell what kind of vehicle is going passed is by using something called inductive loops or peaso cables. The Truvello cameras that face you have two peaso cables across the road just before the camera. These cant tell what clasification of vehicle it is but measure the time taken to cross the two cables, super fast maths and it knows if you are speeding or not.
Now, some of the ‘Gatso’ type cameras that face away from you will have a square cut into the road just before the camera and there is a special type (its name escapes me) of cable that is looped 4 times around this cut and returned to a control panel. The rest of the cut is filled with a resin. These ‘loops’ can count, measure speed and also state the classification of the vehicle passing over it. So, your doing 47 in a national speed limit, your hgv goes over the loops and it tells the camera that your are a hgv and you then get the fine in the post.
These loops are also used to control traffic lights, entry gates and city centre vehicle counts. Reason I know? I used to install and monitor them and my pre hgv days]. Hope this is some help.
And you’ve got the brass neck to come on here now you ■■■■■■■■
its the distance between the tyres and also the gap between the road and the underside of the vehicle. Its a kind of electro magnet that the loop produces.
work on the fact that some will weigh you going over a senser in road about a truck lenth before the camera,and drive at the speed for your vehicle,and you wont go wrong.
royal redgate on the a5 got me over 6 yrs ago in a artic,for doing 48 in a sixty zone,at the end of the dualcarriage, so how did it know without weighing the truck as you go over the sensor.
as for the speed course go for it,there the best 3 hrs worth of entertainment ive had since xmas. got done in dorset on 18 dec in a car at 36 in a 30 zone.
ALL OF DORSETS WILL GET YOU A TICKET.so beware when in that county.
The loops work on mass car small mass 60mph lorry large mass 40mph .made the mistake of asking a traffic officer ( who turned out to be the force geek (anorak )) when i was working on an event once that had a large public march . well that was an hour i wont get back
Never answer the letters I have got except once when I got caught with a gun but if its not sent by recorded delivery how can they prove you got it.
Tried to do me on the A1 east Linton (still not seen a camera there by the way) and then got charged with not answering but as I never received the notice how could I answer.
Two traffic coppers came to my house to charge me and I told them I never got a recorded delivery and I have not heard a thing for 20 months now.
To any coppers looking in this is a disclaimer I am merely bragging to look cool though I will get told off by the 40 mile an hour brigade no doubt. lol
Paul Gloria Meadows:
Ok so here i go looking like a proper geek. The way they tell what kind of vehicle is going passed is by using something called inductive loops or peaso cables. The Truvello cameras that face you have two peaso cables across the road just before the camera. These cant tell what clasification of vehicle it is but measure the time taken to cross the two cables, super fast maths and it knows if you are speeding or not.
Now, some of the ‘Gatso’ type cameras that face away from you will have a square cut into the road just before the camera and there is a special type (its name escapes me) of cable that is looped 4 times around this cut and returned to a control panel. The rest of the cut is filled with a resin. These ‘loops’ can count, measure speed and also state the classification of the vehicle passing over it. So, your doing 47 in a national speed limit, your hgv goes over the loops and it tells the camera that your are a hgv and you then get the fine in the post.
These loops are also used to control traffic lights, entry gates and city centre vehicle counts. Reason I know? I used to install and monitor them and my pre hgv days. Hope this is some help.
The Gatso cameras use a doppler radar to identify between HGV’s and cars, not the loop in the road.
Here are a couple of pictures of the Gatso “Radar 24” unit that is inside the boxes:
On the first you can see there are TWO sets of switches with numbers for entering the speed limit settings in mph (“40” and “41” in this case). Next to the lower set you can clearly see a picture of a car. Next to the upper set is actually a picture of a lorry, but it is obscured by the top cover in that picture.
In the second picture (a km/h version), everything is a bit blurry, but you can definitely see the picture of a lorry.
And here is the extract from the manual proving the fact that the radar can differentiate between HGV’s and cars
