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Motorway Squares

Posted: Thu Apr 26, 2007 10:54 am
by jltownshend
What are the squares of banding for every few hundred yards (and just in the wrong place on on/off ramp roads)?

It's been bothering me for ages... :?

Thanks!

Posted: Thu Apr 26, 2007 11:19 am
by m25jambuster
They are usually used as marker point by traffic police when recording a motorists speed using Vascar equipment. Can sometimes also be used by Police Helicopter crew for the same purpose.

Posted: Thu Apr 26, 2007 11:20 am
by sproggy
I'm pretty sure they're sensors to detect stationary traffic - part of the traffic management system used to monitor the motorway network. But I'm willing to be corrected.

Posted: Thu Apr 26, 2007 11:36 am
by m25jambuster
Sorry my mistake - misread the post - Sproggy is correct. I thought you meant the painted square blocks on the lanes of motorways etc.

Re: Motorway Squares

Posted: Thu Apr 26, 2007 11:41 am
by bigblackfalco
jltownshend wrote:What are the squares of banding for every few hundred yards (and just in the wrong place on on/off ramp roads)?

It's been bothering me for ages... :?

Thanks!
Something for you to aim for when it's raining and you should've changed your tyres a few weeks back :wink:

Posted: Thu Apr 26, 2007 11:44 am
by Stevie
I'm gonna kill that BlackAl. He told me they were guidance instrumentation for alien kidnap flights.

Posted: Thu Apr 26, 2007 11:59 am
by bigblackfalco
sproggy wrote:I'm pretty sure they're sensors to detect stationary traffic - part of the traffic management system used to monitor the motorway network. But I'm willing to be corrected.
Now I'm confused! Can you explain a little better....which white squares?

Re: Motorway Squares

Posted: Thu Apr 26, 2007 12:10 pm
by jltownshend
bigblackfalco wrote: Something for you to aim for when it's raining and you should've changed your tyres a few weeks back :wink:
You've seen me then!

I do seem strangely drawn to the ones on the ramp roads...especially with low tyre pressure...

Posted: Thu Apr 26, 2007 12:39 pm
by sproggy
bigblackfalco wrote:
sproggy wrote:I'm pretty sure they're sensors to detect stationary traffic - part of the traffic management system used to monitor the motorway network. But I'm willing to be corrected.
Now I'm confused! Can you explain a little better....which white squares?
They're not white squares. They're rectangular outlines of over-banding - basically 'they' grind grooves in the road surface in a rectangular pattern, put wires in the groves and then cover them over with over-banding tar. Easy to miss in the dry, not so easy to miss in the wet......

Posted: Thu Apr 26, 2007 12:56 pm
by bigblackfalco
Ahhhh...that makes more slippery sense. They're the ones that make yer sphincter do a 50p piece :shock:

Posted: Thu Apr 26, 2007 3:55 pm
by Blackal
Stevie wrote:I'm gonna kill that BlackAl. He told me they were guidance instrumentation for alien kidnap flights.
The voices told me that's what they were :oops:

They are panels cut in the road, by the company "Trafficmasters" and they can register the speed a car or commercial vehicle is doing. You will notice a grey box at the side of the road in line with them.

a la DS2

http://www.ukspeedcameras.co.uk/guide.htm#DS2

Sneaky - feckin' sneaky :evil:

Al :D

Posted: Thu Apr 26, 2007 4:04 pm
by sproggy
[quote="BlackalSneaky - feckin' sneaky :evil: [/quote]

But it doesn't matter - they don't know who's vehicle it is doing whatever speed they record. Or even what vehicle.

Posted: Thu Apr 26, 2007 4:32 pm
by Stevie
I don't think that's right BlackAl. The loop/grey box combination is operated by Amey (in Scotland anyway) and is there purely to detect traffic flow. In Scotland they are linked into the TrafficScotland data centre (used to be Nadics) which identifies and disseminates congestion information in central Scotland.

The Trafficmaster system uses ANPR boxes which are mast mounted, and coloured blue to avoid confusion with ANPR speed enforcement systems.

Posted: Fri Apr 27, 2007 7:16 am
by sproggy
Stevie wrote:The Trafficmaster system uses ANPR boxes which are mast mounted, and coloured blue to avoid confusion with ANPR speed enforcement systems.
Errr, I don't think that's right - Trafficmaster doesn't use ANPR but simply monitors traffic speed. What would they need with ANPR? Or is Big Brother really watching us in that respect? I hope you're wrong.

Posted: Fri Apr 27, 2007 8:48 am
by Stevie
As I understand it, Trafficmaster were given a licence to use ANPR for traffic flow monitoring. I understand that the conditions of licence were that the number plate information is not to stored or made available to anyone else.

It's described here:
http://www.spy.org.uk/cgi-bin/trafficmaster.pl

Also on the Wikipedia entry for ANPR
The UK company Trafficmaster has used ANPR since 1998 to estimate average traffic speeds on non-motorway roads without the results being skewed by local fluctuations caused by traffic lights and similar. The company now operates a network of over 4000 ANPR cameras [10], but claims that only the four most central digits are identified, and no numberplate data is retained [11].
And theses are the guys that make it:
http://www.pipstechnology.co.uk/