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BoxercupDave wrote:Well, it has happened... caught doing 101mph on the A165 Reighton By Pass.
Stupid? Yes! but it went to that speed so quick!
So I may have to sell the Boxer to pay the fine... not forgetting to pay for bus fares too. Bugger!

That is unlucky and does not mean you are stupid cos that long straight stretch is a cash cow for NYP.

In mitigation tell the bench how good your bike is and how well it is maintained, tell em it is manufactured to do 140mph easily and that 101mph is only at the "Vanilla" end of the scale


Bad luck.

BoxercupDave wrote:
........ My first offence since getting my licence in 1976.

You've done well to avoid getting clocked till now!

These days, certainly around here (yorkshire/Lancashire) it is more a matter of when, not if. Just try to keep it the right side of wrong, if you see what I mean.

How you gonna know for sure if the bike behind you is civvy?

(Ride faster so he's not behind you in the first place )

Good luck with the outcome.

[/quote]
I'm no expert but surely they'd have to show video or a picture of you going through a gatso or similar. Otherwise; as above...[/quote]

Hello,

Normally (Speaking from my experience) there is photographic evidence on the NIP which arrives along with a load of leaflets to make you feel that you are a pariah of society for daring to speed...

Best regards,

David

I was clocked at 101mph in my car on the M56 in 2010 by a mobile camera on a bridge. Hardly anyone else on the road apart from one or two cars that I was overtaking.

I received the NIP and also a written statement from the police officer who was with the camera (he was dressed in black). No picture or video. I pleaded my case, said my apologies and received a fine and 6pts.

I can only suggest you to likewise and take your punishment.

On a slightly funnier note, as I left the court I was guided to a telephone where I could make a call to pay my fine. I used a credit card - and got cashback on the payment !!

Corvus wrote:

Blackal wrote:
.........Sold his Fireblade the week after.

Al

What's he buying instead?

Klingon Bird Of Prey?

He bought a wee 400 trail-type bike, but has admitted that if he wins the DG case - he's going for a 600 supersport.

Al

Vector errors.

Just on the general subject of speed measurement, how does a hand held device or a van mounted device go on if it is used on the opposite side of the road, too near a corner or too near a very steep hill, to name three examples that spring readily to mind?

Good point but any error (pretty small I think) would be to your advantage as the hand held device measures the changing distance of the vehicle and compares it to time.

Take the extreme example of the vehicle being square (90 degrees) to the gun, I'm guessing it wouldn't measure it's speed, unless they are a lot cleverer than I'm assuming.

Topcat wrote:Good point but any error (pretty small I think) would be to your advantage as the hand held device measures the changing distance of the vehicle and compares it to time.

Take the extreme example of the vehicle being square (90 degrees) to the gun, I'm guessing it wouldn't measure it's speed, unless they are a lot cleverer than I'm assuming.

That's exactly the conclusion I came to.

But is it legal? As in accurate.

Maybe not 100% accurate but any defense that starts "Your Honor, I can prove that in fact my client was travelling faster than the recorded speed..." won't get many second customers

Topcat wrote:Maybe not 100% accurate but any defense that starts "Your Honor, I can prove that in fact my client was travelling faster than the recorded speed..." won't get many second customers

In reality, no.

In my fantasy tho, I imagined something like this:

Right officer, what speed was the accused doing?

Well, we clocked her at 78mph, m'lud.

Yes, but the accused claims that, due to incorrect positioning, what she claims as velocity vector errors or parralax errors have rendered the reading inaccurate.

Yes m'lud, that's true but the errors work in our favour. She will have been going even faster than our readings show.

Yes officer, but what speed?

Er.

I like the idea but in the real world, your screwed!

As I’m sure you know, you can’t measure anything 100% accurately. You can count things but not measure, be it speed, distance, temperature or angles. As far as speed is concerned, the law knows this as well.

Over 150m with the gun offset by 10 m, the difference in distance is about 0.3m. With that fact known, the officer would be able to give a reasonable reply.

I never seen one of the guns (well, not close up ) but it wouldn't surprise me if they have a distomat function that allows the user to swing approx. 90 degrees and measure the offset to the carriageway which can be used in the calculation of the speed. Getting closer to the true speed.

As you have said, loads of other things come into play such as the horizontal and vertical alignment of the road, temperature, air density and the fact that sometimes the gun is hand held.

For the average speed and fixed position camera’s there is a huge amount of testing to be done involving the police, Dept of Transport, the Home Office (I think) and the installers before they can start issuing tickets. Can take up to three months before they become live, hence you don’t see them on road works of short duration (unless they have sped up the process since I was on a motorway project).

I would guess the same has happened for the hand held or camera van device in the form of trials and training, to ensure the prosecution stands up in court.

Any measure of speed will only be a rough estimate hence the 10% plus 2 rule (if it’s true but seems to be). The problem would come when they try and prosecute for 31mph etc. You sometime hear in the press about calls for any amount over the limit to be enforced but they simply can’t do it.

Must say to BoxercupDave, very sorry for the thread hijack btw, should have said this before.

Hope all works out well.

Coming around a long bend is an interesting one. If the reading commences too early, and starts reading mid bend, as you straighten up more head on to the gun the rate of change won't have been a linear thing. If the gun uses Doppler effect might this scenario show you going faster you were?