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Old 11.05.2012, 22:50
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Re: Fine for 3 Km/h

hmmm I love the bliss of the ignore list...

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Old 11.05.2012, 23:30
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Re: Fine for 3 Km/h

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Going 3 Km/h higher than the speed limit means that if you brake, you will be 3 Km/h faster at all times during the deceleration phase (assuming constant braking force at all speeds - which is a best-case scenario because usually the braking force is smaller at higher speed).
It's very simple: I'm saying that the decelaration, given that the car has the same mass and applying a constant braking force, is NON-constant.
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Old 11.05.2012, 23:44
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Re: Fine for 3 Km/h

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It's very simple: I'm saying that the decelaration, given that the car has the same mass and applying a constant braking force, is NON-constant.
F=m*a.

If F is constant, a must be constant, given that m is constant.

QED

It was indeed simple
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  #64  
Old 12.05.2012, 08:53
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Re: Fine for 3 Km/h

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I've noticed in the last few days that my car seems to have a large margin for error. There's quite a few of the speed panels up around town at the moment that flash up what speed you're doing. I was doing what looked to me on my speedo as 58-59 (in a 60 zone) but the board showed 52. Is it common to have such a large differential?
First off, yes, it's normal that a car speedo may be up to 10% overreading. Secondly those 'show your speed' devices are themselves very variable. Many in French villages, for example, will display about the same +5-10% as most cars' speedos, whether by accident or design I'm not sure, but then some of them will give an accurate reading, as you seem to have found.

Best rule is to ignore them, although sadly they do seem to be effective at making people drive slower than they need to.
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Old 12.05.2012, 09:00
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Re: Fine for 3 Km/h

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Yes. Car speedos are calibrated fast at the factory. How much varies between manufacturers. It's to remove the liability from the manufacturer in the event of an accident. Ie to prevent you gong faster than you wanted to..
It's actually done to comply with Contruction and Use regulations: a speedo may overread by up to 10%, but must not underrread, so by building this in, the manufacturer ensures compliance.

Interestingly, on my Passat there's a way of setting the AC temp display to various diagnostic modes, one of which displays the speed as measured. This turns out to be incredibly accurate on standard sized tyres, within +/-1kph of a GPS reading at all times. It's clear then that the +9% speedo reading is deliberately added by the system and is not just a lack of precision.
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  #66  
Old 12.05.2012, 09:18
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Re: Fine for 3 Km/h

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Dumbass, let me roll over your foot with my car at 3 Km/h. I guarantee that, as you said, you won't die but maybe you won't forget the experience either
It also won't hurt much. Been there, done that. The kid on scooter would probably hurt more. Been there, done that too...
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Old 12.05.2012, 10:13
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Re: Fine for 3 Km/h

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Best rule is to ignore them, although sadly they do seem to be effective at making people drive slower than they need to.
The otherway of looking at it, is that it is incredibly kind of them to do that so that we get fewer bills.

What this does mean though, is that in real life those caught speeding 10 over, may actually have had "in car" speedo readings of 10, 15 or 20 over depending on the calibration. So while they may only have been speeding a little in real life, they may have also been "knowingly" speeding (without knowing about the level of calibration of their particular vehicle).
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  #68  
Old 12.05.2012, 10:33
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Re: Fine for 3 Km/h

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"Dura lex sed lex", said the Romans (the law is hard but it's the law).
Yes, maybe.
But today I hate the system. In a week I might change my mood...
Dura lex sed lex, yes, although it's really funny that Italians are well known in the world not to obey rules.
  #69  
Old 12.05.2012, 10:52
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Re: Fine for 3 Km/h

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It also won't hurt much. Been there, done that. The kid on scooter would probably hurt more. Been there, done that too...
That may be true in certain cases, but after having worked in maxillofacial surgery for quite a few years, I can tell you that being hit by a car at 3 km/h can easily crack your skull and more.
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Old 12.05.2012, 11:27
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Re: Fine for 3 Km/h

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That may be true in certain cases, but after having worked in maxillofacial surgery for quite a few years, I can tell you that being hit by a car at 3 km/h can easily crack your skull and more.
No shit. I was talking about driving over someone's foot though.
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Old 12.05.2012, 11:45
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Re: Fine for 3 Km/h

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Yeah I just received (in Italy, since my car still has Italian plates) a fine for travelling at 56 Km/h, limit 50, with a tollerance of 3 Km/h, so that makes a "speeding" of 3 Km/h. 33 €.
Now cmon, just printing it, shipping to Italy, handling the fine will make the incoming null for them!
And all of that for 3 Km/h! I didn't even realize I was speeding.
You must remember it is an automated system.

IF (detected_Speed - Tolerance_Value) > allowed_Speed THEN IssueFine

Whether you are 1, 2, 5, 10, 20, 50, or 100 over the limit: the result is the same.

The system is extremely fair - a tolerance value has already been deducted.

There is only one thing you can do: pay the fine.
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  #72  
Old 12.05.2012, 12:13
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Re: Fine for 3 Km/h

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Dura lex sed lex, yes, although it's really funny that Italians are well known in the world not to obey rules.
Well, Italians are very different now from the Romans during the Roman Empire.
  #73  
Old 12.05.2012, 12:17
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Re: Fine for 3 Km/h

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F=m*a.

If F is constant, a must be constant, given that m is constant.

QED

It was indeed simple
Yes you were right. I was thinking about the energy dissipation.

Peace and love anyway, eh?
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Old 12.05.2012, 18:01
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Re: Fine for 3 Km/h

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Yes you were right. I was thinking about the energy dissipation.

Peace and love anyway, eh?

Tons of abuse and six red cards later, I am glad to have been right all along but this has taught me a lot about the people on EF I will keep my school-level physics to myself from now on.
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Old 12.05.2012, 18:12
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Re: Fine for 3 Km/h

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Tons of abuse and six red cards later, I am glad to have been right all along but this has taught me a lot about the people on EF I will keep my school-level physics to myself from now on.
Well read what you wrote as well, not only what the other wrote. This used to be a funny thread.

Last edited by titius; 12.05.2012 at 18:28.
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  #76  
Old 12.05.2012, 18:43
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Re: Fine for 3 Km/h

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Well read what you wrote as well, not only what the other wrote. This used to be a funny thread.
I am sorry but speeding is not funny for me... It seems to be a joke for almost everyone else on here and that's a shame and, in hindsight, I should have kept my mouth shut.
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Old 12.05.2012, 20:41
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Re: Fine for 3 Km/h

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I am sorry but speeding is not funny for me... It seems to be a joke for almost everyone else on here and that's a shame and, in hindsight, I should have kept my mouth shut.
You still haven't read or understood a thing anyone has said here. Nobody has condoned speeding. Everyone has acknowledged that the limits should be adhered to - while they are in place. Anyone caught speeding has accepted their error and their fine in good grace.

Nobody has joked about the speeding - only *your* unrealistic, biased, uncompromising and uneducated (still waiting for your evidence btw) world view on it. And you bit. Hard. That's what got your red cards.

Perhaps a bit more time reading what people actually said, and forming educated, rational responses would have got you greens and thanks. And a sense of humour helps too.

Now please - lets shake hands and no more blanket groaning, so we can all get back to actually answering the OP's original concern?
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Old 12.05.2012, 20:52
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Re: Fine for 3 Km/h

Serves you right. anti-social git. U were 6 (not 3 km.) over the limit.
Garrotte or impalement!??

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Yeah I just received (in Italy, since my car still has Italian plates) a fine for travelling at 56 Km/h, limit 50, with a tollerance of 3 Km/h, so that makes a "speeding" of 3 Km/h. 33 €.
Now cmon, just printing it, shipping to Italy, handling the fine will make the incoming null for them!
And all of that for 3 Km/h! I didn't even realize I was speeding.
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Old 12.05.2012, 20:59
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Re: Fine for 3 Km/h

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That may be true in certain cases, but after having worked in maxillofacial surgery for quite a few years, I can tell you that being hit by a car at 3 km/h can easily crack your skull and more.
I believe you. Genuinely.

I do think there are other forces at play here though. Or you'd be seeing tons of people cracking skulls who walked into the fridge door, roof spars, corners etc at 2mph.

My *personal theory* (take note of emphasis) is its probably a leverage issue. Hitting something at 2mph is nothing...but if force was applied at a "lever"...say a leg, at or around knee height...it would significantly accelerate the item at the end of the lever (ie the skull) to way more than 2mph.

Theory 2: There is also the possibility the injuries occur not at the moment of impact, but immediately afterwards, when gravity accelerates the now destabilized human towards the pavement.

It is this very scenario that new crash tests must address:
http://en.wikipedia.org/wiki/Euro_NCAP

PS Krash - no comments about quoting Wikipedia please.
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Old 12.05.2012, 21:02
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Re: Fine for 3 Km/h

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Serves you right. anti-social git. U were 6 (not 3 km.) over the limit.
Garrotte or impalement!??
I believe "4-horse tractor delimbing" is the traditional method in Italy? Or it was when the Romans ran it. Before they got into crosses.
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