Gatso technology - HGV/Car Differentiation?

aj2052 · Posted: Thu May 08, 2008 12:53 am Post subject:

I note it says _can be set_ in my mind this does not mean it can automatically distinguish between cars and lorries

G1LIW · Posted: Thu May 08, 2008 6:34 am Post subject:

Andy_P · Posted: Thu May 08, 2008 11:54 am Post subject:

Well, I have found some pictures on the web that DO seem to imply that the standard radar detector used in a Gatso box CAN have two speeds set. I haven't got the links with me at work, but I'll sort them out tonight.

not_sure_i_care · Occasional Visitor Joined: Apr 10, 2008 Posts: 23

G1LIW · Posted: Thu May 08, 2008 10:41 pm Post subject:

All of them Twisted Evil

Seriously, they have to be installed and calibrated by someone, so if not by the manufacturer, then by a trusted installer, say a Police Employee?
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not_sure_i_care · Occasional Visitor Joined: Apr 10, 2008 Posts: 23

I am not a Police Officer.

Edit: Nor am I a Police Employee, just someone in the general industry. Is that enough?

Andy_P · Posted: Fri May 09, 2008 12:52 am Post subject:

OK, let's give the guy a break.
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.

The yellow rotary switch between the two sets looks like it is used to select the upper, the lower, or both settings, giving the possibility of dual speed detection for different vehicle types. How often it is used like this I don't know.

aj2052 · Posted: Fri May 09, 2008 1:20 am Post subject:

Dual Direction aswell(red button)???? sorry red rotate switch

Darren · Posted: Fri May 09, 2008 7:48 am Post subject:

M8TJT · Posted: Fri May 09, 2008 8:13 am Post subject:

Flash!! You're blind.

One of my local cams on a dual carriageway, although only trapping westbound traffic, flashed if someone was doing about 50mph in the opposite direction (40mph limit) so must have been set to both ways. The flashes are quite bright Crying or Very sad

and a bit of a surprise at night. Shocked

Anita · Posted: Fri May 09, 2008 8:15 am Post subject:

You just don't want to get caught when you're on your bike, Darren! Wink

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Skippy · Posted: Fri May 09, 2008 6:55 pm Post subject:

not_sure_i_care · Occasional Visitor Joined: Apr 10, 2008 Posts: 23

Gatso cameras are not type approved for forward facing enforcement. Therefore cannot be used to prosecute in the UK. In some instances a Gatso camera can 'flash' when driven towards it in the 'wrong' direction but this obviously does not happen for every camera. Otherwise we would all heve seen it.

It is to do with the angle of the camera and the footprint of the approaching vehicle that fools the radar into taking a photograph (they always flash regardless of ambinet light). Some Partnerships paint lines on both sides of the road to fool drivers into thinking that they can operate in both directions. If you were 100% sure how they worked, would you risk it?

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