Speed Cameras

Goksly · 26 Aug 2006 at 18:48

Just the normal side of the road ones -> Can they snap two lanes at once (either both going away from it, or one away and one towards)?

Hilly · 26 Aug 2006 at 18:51

Gatso's can't flash front ways. Truvelo's can.

Defcon5 · 26 Aug 2006 at 19:04

hilly said:
Gatso's can't flash front ways. Truvelo's can.

Theyre.... .... evolving...

Goksly · 26 Aug 2006 at 19:36

ah coolio.... will be uber careful in future then

[ Ry ] · 26 Aug 2006 at 21:01

Got flashed by what I think was a truvelo in Liverpool last night but I was only traveling an indicated 28/29mph, it was front facing and I'm not sure if a car was going the opposite direction and also the car infront went through considerably faster than me.

Anyone know if they can get you from the front? Or anyone who knows Liverpool can they tell me what type of camera they are? Quite worried now even though I wasn't speeding.

BenST · 26 Aug 2006 at 21:28

Truvelo are forward facing and have two circle lenses one smaller than the other. Gatsos are rear facing and are preceeded with white painted lines on the road ahead.

Havana_UK · 27 Aug 2006 at 08:20

You only set Truvelos off when going towards them.

You only set Gatsos off when going away from them.

Hav

csmager · 27 Aug 2006 at 10:13

Havana_UK said:
You only set Truvelos off when going towards them.

...and you set a Truvelo off by running over the three (?) white lines/pressure sensors a few metres in front of the camera. People slamming their brakes on when they see the thing a mile off can get quite irritating.

Havana_UK · 27 Aug 2006 at 10:38

csmager said:
...and you set a Truvelo off by running over the three (?) white lines/pressure sensors a few metres in front of the camera.

Is there any truth in that?

I'm fairly sure the white lines are just painted on the road for reference in the photgraphs. AFAIK the cameras use an infrared sensor which measures vehicle speed and determines whether it will photograph or not.

Hav

csmager · 27 Aug 2006 at 10:41

The infra red is just the flash - it can't be used as a measure of speed, it's just to light up the picture without blinding you.

http://www.gps-systems.co.uk/truvelo_speed_camera.asp

dirtydog · 27 Aug 2006 at 10:47

Havana_UK said:
You only set Truvelos off when going towards them.

You only set Gatsos off when going away from them.

Hav

You can set Gatsos off which are facing you on the other side of the road because I've done it a number of times. I realise you can't be convicted though - or at least I assume not.

Nazbit · 27 Aug 2006 at 10:48

[ Ry ] said:
Anyone know if they can get you from the front? Or anyone who knows Liverpool can they tell me what type of camera they are? Quite worried now even though I wasn't speeding.

Where about where you?

There are only a hand full of Truvelo cameras in liverpool that I know of, allmost all are Gatsos.

Trifid · 27 Aug 2006 at 11:11

What happens when you are on a bike and set off a Truvelo? Do they have rear facing camera's to get the plate?

quackers · 27 Aug 2006 at 11:20

Were is it? I dont think i've ever come across one

Nazbit · 27 Aug 2006 at 11:26

Trifid said:
What happens when you are on a bike and set off a Truvelo? Do they have rear facing camera's to get the plate?

Nope bikes are free to race through and present the finger

Sirrel Squirrel · 27 Aug 2006 at 11:48

dirtydog said:
You can set Gatsos off which are facing you on the other side of the road because I've done it a number of times. I realise you can't be convicted though - or at least I assume not.

yep, I've set many off on the wrong side of the road, even when doing double the speed limit I've never heard anything.

BenST · 27 Aug 2006 at 17:36

Havana_UK said:
Is there any truth in that?

I'm fairly sure the white lines are just painted on the road for reference in the photgraphs. AFAIK the cameras use an infrared sensor which measures vehicle speed and determines whether it will photograph or not.

Hav

Truvelos use two pressure strips embedded in the road surface to measure speed. The three white lines are used to differentiate cars that go through the camera at the same time as it is set off. The infra-red flash as someone has already explained is used to illuminate the number plate without blinding the oncoming driver. Gatsos, flashing from beind, would not exhibit this behaviour.

Gatsos use radar to determine the vehicles speed, the white lines painted in front of the camera are used as a guide to operators to show how fast the vehicle was actually travelling.

csmager · 27 Aug 2006 at 17:53

This site has a good picture of the 'three white lines' it uses as a check, and you can see the two piezo strips in front (although they're usually not that obvious)

http://www.ukspeedtraps.co.uk/gatso09.htm