Brake tester on M-way ends up in the trees Do Not Brake Test
Discussion
RobM77 said:
On another note, is this 10% business written into law? I'd expect to still be breaking the law doing 52mph in a 50 limit zone and just relying on the goodwill or lack of pedantry on the part of the police or who's set up a camera.
I always thought it was 7% + 1mph for discretion, but I do know you can get rumbled at 1mph over. I know someone who did! Although it's rare. Interested to get the gen from someone who actually knows the law, rather than my speculation.
CS Garth said:
I'd always understood rule of thumb was 10% plus 2mph
I'm almost certain it was never a rule, but the guideline for an officer's discretion. Not that they have to allow it. If you're doing 71 in a 70 zone, you are breaking the law, so it's entirely possible you can get ticketed. As I understand it to be.
Just had a quick look, I think you're correct. Guidelines seem to have been 10% + 2. But I'll happily be educated contrary to my understanding.
RobM77 said:
I'm not sure why you think you can make a definitive statement on that. Whilst it's unlikely for a car to leave the factory with an under-reading speedo, any number of subsequent issues could cause that to happen, from a technical fault to a change in tyre rolling circumference (which if it's a secondhand car might not be apparent to the car's new owner). Given the paltry gains to be had mucking about with 2 or 3mph differences in speed, I'd personally prefer to side with caution.
On another note, is this 10% business written into law? I'd expect to still be breaking the law doing 52mph in a 50 limit zone and just relying on the goodwill or lack of pedantry on the part of the police or who's set up a camera.
No it is guidance for police forces, originally introduced by ACPO and now the NPCC. It is always essentially 10% + 2. Although critically it can vary from force to force.On another note, is this 10% business written into law? I'd expect to still be breaking the law doing 52mph in a 50 limit zone and just relying on the goodwill or lack of pedantry on the part of the police or who's set up a camera.
Cheshire used to operate for instance on 10% + 1mph
Kent is the guidelines, excluding 30 mph where prosecution begins at 36mph not 35 mph.
Put simply for many the guidance is 10% + 2mph + vehicle error upto 10%. Which means for Kent you could in theory be doing an (indicated) "38 mph" before action if your speedo was 10% out....
LocoCoco said:
3. Open the hood, this one is by far the most effective, optional extra is to hold something up in the air afterwards, a watermelon works very well. I've yet to meet a tailgater that wants to be right behind the car that dropped it's roof at motorway speeds. This technique causes unwanted wear and tear on the car though so is only used against aggressive tailgaters.
Just so you know, I'm holding you partially accountable when I inevitably drop a watermelon off the back of my Mx5 because that sounds hilarious.Maybe throw a few banana peels over my shoulder too.
dannyDC2 said:
Someone brake tested me at silly speed the other day, almost stacked it into the back of them, what goes through someones mind to do this? C
s.
If you were doing silly speeds at that distance, it's quite likely they assumed* you were both racing (rightly or wrongly), they couldn't shake you so got incensed that theircar was slower.s. The lesson to take away is to always keep a safe distance, especially at silly speeds, and if they won't move over either suck it up or wait for a big enough gap to overtake safely.
- Disclaimer: i speak from experience after I found myself in the situation where I thought I was having a well-mannered play with a fellow petrolhead, who turned out to be a psycho who thought i was racing him and we were on a NASCAR track...
Ninja59 said:
No it is guidance for police forces, originally introduced by ACPO and now the NPCC. It is always essentially 10% + 2. Although critically it can vary from force to force.
Cheshire used to operate for instance on 10% + 1mph
Kent is the guidelines, excluding 30 mph where prosecution begins at 36mph not 35 mph.
Put simply for many the guidance is 10% + 2mph + vehicle error upto 10%. Which means for Kent you could in theory be doing an (indicated) "38 mph" before action if your speedo was 10% out....
when i got done by a met officer he told me if i had got done by kent i would have had to go to court rather than a FPN as i was just on the mets limit but over kents Cheshire used to operate for instance on 10% + 1mph
Kent is the guidelines, excluding 30 mph where prosecution begins at 36mph not 35 mph.
Put simply for many the guidance is 10% + 2mph + vehicle error upto 10%. Which means for Kent you could in theory be doing an (indicated) "38 mph" before action if your speedo was 10% out....
I was being tail gated for about 30 miles up the m40 the other week.
L1 and L2 was interspersed with the odd lorry and many middle lane hoggers. I was often in lane3 (of 3)making progredd. But, because it was damp, I was keeping what I view as sensible gap.
The car behind (x3) obviously couldn't comprehend this, as was probably 2 to 3 car lengths behind.
When traffic cleared, I promptly moved left, often to L1, yet x3 made no ground on me whatsoever, so when the next mlm hove into view, I moved back to l3 to overtake.
This went on for 30 odd miles. God knows what was going though his head, but if he was unable to make ground on a 115ps diesel then I think his pretentions at owning the road were somewhat misplaced.
The relevance to this thread (yes, there was one) is that tail gating is often irrational, and game theory usually means the person that sinks the lowest usually wins.
Ps I didn't go over 95 in the scenario above, but I dread to think what would happen if I ever had to brake like that jag. My tyres are good, but I like a big gap at m-way speeds to avoid that sort of blind panic braking.
More so when riding my motorbike, where imagining emergency braking at that sort of speed goes from awful to horrifying...
L1 and L2 was interspersed with the odd lorry and many middle lane hoggers. I was often in lane3 (of 3)making progredd. But, because it was damp, I was keeping what I view as sensible gap.
The car behind (x3) obviously couldn't comprehend this, as was probably 2 to 3 car lengths behind.
When traffic cleared, I promptly moved left, often to L1, yet x3 made no ground on me whatsoever, so when the next mlm hove into view, I moved back to l3 to overtake.
This went on for 30 odd miles. God knows what was going though his head, but if he was unable to make ground on a 115ps diesel then I think his pretentions at owning the road were somewhat misplaced.
The relevance to this thread (yes, there was one) is that tail gating is often irrational, and game theory usually means the person that sinks the lowest usually wins.
Ps I didn't go over 95 in the scenario above, but I dread to think what would happen if I ever had to brake like that jag. My tyres are good, but I like a big gap at m-way speeds to avoid that sort of blind panic braking.
More so when riding my motorbike, where imagining emergency braking at that sort of speed goes from awful to horrifying...
RobM77 said:
Ahbefive said:
RobM77 said:
That assumes you're speedo/cruise error is 0%... What if it's not? What if my indicated 55mph is 58mph?
.
It won't. If your speedo is saying 55mph then you will be doing 55mph or less, not more..
.
To ensure that they comply with the law and make sure that their speedometers are never showing less than true speed under any foreseeable circumstances, car manufacturers will normally deliberately calibrate their speedos to read ‘high’ by a certain amount. As your satnav is not the designated device by which a car’s speed is measured, it does not need to incorporate any fudge factoring.
If you have changed your wheels and tyres from standard then this may be a problem but to cite technical failure is ridiculous as this would be much more like massively exaggerate the false speed one way or another rather than affect it by a couple of mph.
If you have trucks right up your bumper is it likely that due to following your (likely wrong)
speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
Edited by Ahbefive on Friday 9th February 16:34
Register1 said:
It's always the damn BMW drivers.
I don't know what go's through their mind, but more often than not, the guy up your chuff is driving a BMW
R1
They don't tailgate me, perhaps out of professional courtesy, maybe out of reverence for the myriad of M\\\ badges.I don't know what go's through their mind, but more often than not, the guy up your chuff is driving a BMW
R1
Seriously though, its usually an Audi crawling up your tailpipe around my neck of the woods.
Was looking for other similar clips on youtube and found this old PH Favourite the dosy Morgan driver pulling out in front of high speed traffic
https://youtu.be/lLBuedP9rQA
https://youtu.be/lLBuedP9rQA
Ahbefive said:
If you have trucks right up your bumper is it likely that due to following your (likely wrong)
speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
So? It's a limit not a target. The cocksocket is not the person sticking to the limit. For whatever reason and however low their actual speed may be in comparison to their speedo they are perfectly entitled to do that speed without a HGV driving a foot off their bumper. speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
zygalski said:
Also a good demonstration of how brake checking can cause the tailgater to lose control and possibly endanger innocent parties. Perhaps the solution is to have a designated 'brake test day' where those who like brake testing can wipe out the tailgaters but sensible people can arrange not to drive that day so they won't spin into us.LocoCoco said:
I've got another few advanced techniques to deal with tailgaters:
1. Push the accelerator and brake at the same time, try to keep constant speed. If they stay on your backside start varying your speed up and down whilst keeping brake lights on.
Nice idea, but in a lot of modern VAG stuff (and I daresay others) that would result in a temporary loss of all power, and perhaps a blink of the engine management light. And a lorry embedded in your boot after the driver was caught out by the sudden deceleration.1. Push the accelerator and brake at the same time, try to keep constant speed. If they stay on your backside start varying your speed up and down whilst keeping brake lights on.
A lot of modern stuff can't deal with concurrent throttle and brake inputs.
Fastdruid said:
Ahbefive said:
If you have trucks right up your bumper is it likely that due to following your (likely wrong)
speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
So? It's a limit not a target. The cocksocket is not the person sticking to the limit. For whatever reason and however low their actual speed may be in comparison to their speedo they are perfectly entitled to do that speed without a HGV driving a foot off their bumper. speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
You obviously didn't read my post. They may think that they are doing the speed limit but chances are they aren't anywhere near it.
Of course the truckers shouldn't do it but it is frustrating when people are doing way less than the speed limit and think that they aren't.
Dr Jekyll said:
Once and for all. If I'm in lane 1 of a 50MPH limited stretch of motorway with more cameras than Dixons. Doing 52MPH on the GPS with a massive truck so close behind I can barely see the headlamps.
Just what am I supposed to do?
Incidentally what possible benefit does the truck driver get from driving so close?
That’s easy. Cycle your speed between 40 and 50. Bonus points for doing it on long inclines.Just what am I supposed to do?
Incidentally what possible benefit does the truck driver get from driving so close?
Ahbefive said:
Fastdruid said:
Ahbefive said:
If you have trucks right up your bumper is it likely that due to following your (likely wrong)
speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
So? It's a limit not a target. The cocksocket is not the person sticking to the limit. For whatever reason and however low their actual speed may be in comparison to their speedo they are perfectly entitled to do that speed without a HGV driving a foot off their bumper. speedo to the digit that you are driving way slower than the speed limit and therefore holding up the flow of traffic.
You obviously didn't read my post. They may think that they are doing the speed limit but chances are they aren't anywhere near it.
Of course the truckers shouldn't do it but it is frustrating when people are doing way less than the speed limit and think that they aren't.
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