Si Click
Well-Known Member
Nothing to do with the Law. 10% +1 was a figure agreed many years ago at the then Association of Chief Police Officers (ACPO), now the National Police Chief's Council. It was never Law and local Police Forces were never actually required to follow it, though most did. Famously Richard Brunstrom, Chief Constable of North Wales until 2009 and ACPO's Head of Policing Policy, tried to push a zero tolerance policy in North Wales, crushing two cars and using footage of a decapitated biker to advertise the dangers of speeding (Probably should have spoken to the family first Richard).
As said, it is now down to the local Safety Partnership who are absolutely driven by safety and not profit........
mick 1986
Well-Known Member
I got my figures from a North Yorkshire police officer when I worked at Ripon. You can believe what you want though.
I think the 10% gets dragged in from vehicle construction regs, which allow speedos to over-read by up to 10%. Never allowed to under read. So, if your speedo shows 70, in fact you might be doing 63..... So some feel that means you could have speedo showing 77 and in fact only doing 70.....follow?
Trouble is you might have a completely accurate speedo and actually be doing 77....
Of course manufacturers wouldn’t play the 10% to make you think your vehicle is faster would they...? ;-)
I’ve ridden my bike alongside a calibrated police bike, and the speedo shows 77 when actually doing 70. Who’d have thought.... ;-). Cheers A
Trouble is you might have a completely accurate speedo and actually be doing 77....
Of course manufacturers wouldn’t play the 10% to make you think your vehicle is faster would they...? ;-)
I’ve ridden my bike alongside a calibrated police bike, and the speedo shows 77 when actually doing 70. Who’d have thought.... ;-). Cheers A
Si Click
Well-Known Member
So if the odometer is driven from the same data that feeds the speedo, a car with an inbuilt 10% over-read would get to the warranty mileage 10% quicker....no I'm sure they wouldn't do that......
blue beasty
Leaks an prone to bits dropping off
New cameras on smart motorways have small, difficult to spot grey cameras that don't need tell tale white lines on the tarmac.
raywin
Well-Known Member
Well we have started to see laser vans on our roads (North Yorkshire ) recently and my mates wife was issued a notice at 32mph in a 30 zone, attended a speed awareness course first time then went and did it again.
They seem to favour spots where you just pass a 30 sign and may not have brought your speed down quickly enough.
Always wondered how they would react if you turned up for the speed awareness dressed as the stig.
mick 1986
Well-Known Member
To be fair, I worked at Ripon back in 2008-2010, so things have probably changed a little. He was an armed response officer, so may not be up to speed on things!
Tis a myth. The apco guidelines were just that, guidelines. The speed limit is finite. Ratty got done for being 1mph over.
none of the cameras need the white lines. Smart motorways have the yellow cameras on the left hand of gantrys, the grey boxes on over head gantrys and the infra red on top of cantilever matrix boards. The fella from CP told me the boxes only cover the outside lane and aren't always on, the matrix signs cameras cover all lanes and are always on. Not sure how trust worthy that was, and probably out of date even of it was correct.
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Plus or minus 10% at indicated speed is the old speedo calibration allowance up to 2001, it has to be applied to vehicles made before that date. That is why speed cameras are set that way. After that, actual speed can be under indicated but not over. EU ruling 1999. Enforced in UK from 2001. So any vehicle made before that can legally be doing up to 77 mph at an indicated 70.
blue beasty
Leaks an prone to bits dropping off
raywin
Well-Known Member
Like the old Frank Carson gag, can you put 85 mph on the ticket I'm trying to sell the car.If I'm doing 77 mph in me Series a ticket is the last of me worries
This is true.If I'm doing 77 mph in me Series a ticket is the last of me worries
Wear in your tyres will show a higher speed on the speedo than you are actually doing. If you fit larger rolling radius tyres on than standard, you will be going faster than the speedo indicates. Old rules updated in 2001 were that the speedo can have a actual speed 10% error up or down when 30 mph is indicated. Goes back to the time when there was no speed limit anywhere other than 30 mph max in built up areas.
tomcat59alan
Well-Known Member
God you must have been peddling bloody quick
discool
Well-Known Member
You’re not wrong with “vehicle construction regs” bit, my disco speeds reads 70 while the windscreen mounted sat-nav reads 65, my normal car the dash sat-nav reads 70 and so does the digital speedo and both match whatever speed I’m doing + - 3mph
KISSMYAURA
Well-Known Member
I tend to believe the law, and not the police, mainly because I train them for a living, admittedly i don't work in North Yorks though ....
KISSMYAURA
Well-Known Member
Correct, remember not to confuse a prosecuting agencies decision to prosecute with the material fact of weather or not a law has been broken, the law is 1 mph over = offence committed.
Police prepare evidence and then decide to either:
a) offer a FPN
b) report by way of summons for prosecution by CPS who actually decide to prosecute, (in practice excessive speed evidence is a standard format so will always result in a prosecution unless CPS process spots errors in the evidence.
The offence relates to the actual speed of the vehicle and not what the driver believes the speed to be for whatever reason, whilst your speedo's inaccuracy may be a factor, a driver referencing this does two things ;
a) admits the vehicle they were driving was in an unroadworthy condition if its underreporting the speed,
b) QED admits they have no idea what speed they were actually doing
Faulty speedo fine = £2,500 for goods vehicles ( so thats most of us defender owners) and £1,000 for other vehicles.
Ironic really that this amount of money goes onto securing (in the main) the collection of fines, bit of a contrast when you look at other offences such as burglary. Try looking at the penalties for tax evasion balanced against sexual offences for example.....
