UK speed camera tolerances revealed (Somewhat).

[empip]

https://www.autoexpress.co.uk/car-n...erances-revealed-is-your-cars-speedo-accurate
Most responding forces using 10% + 2MPH as per the now defunct ACPO (Association of Chief Police Officers) guidelines (not legislation), despite there being a tolerance guideline, that does not override the final decision of a police officer.

ACPO replaced by National Police Chiefs' Council (NPCC).

Another FREEDOM OF INFORMATION REQUEST and response :-
https://www.whatdotheyknow.com/request/npcc_guidelines_on_speed_limit_e?unfold=1#incoming-1122159

-0-

 

[mointainwalker]

Hmmm - that seems very generous. Here in France, 5% is deducted from measured speed for a stationary installation and 10% for the new mobile-units fitted to vehicles which measure as they drive.

Your ticket gives you both the measured speed, and the speed you are being fined for .

At 40 kph over the limit the gendarmes/police take your licence away ( = temporary driving ban until you go to court ) and there will probably be a month ban, and at 50 kph they impound your car - unsure for how long, and can confiscate it if the offence is serious enough. Minimum fine outside town is € 68 and in a 50 kph limit € 135 with one point off your licence ( the system here is you start with 12 points and lose them for offences )

If you look at national politics, reducing road deaths is the only policy that has been a success since, say 2007, and therefore (all ) governments have kept the pressure on and policing is much tougher than it used to be. Macron's universal application of the 80 kph limit on single-carriageway roads hasn't yet proved to be the outright success that he had hoped, and it did have the unexpected effect of launching the "gilets jaunes " protest movement.

 

[foxhole]

Hmmm - that seems very generous. Here in France, 5% is deducted from measured speed for a stationary installation and 10% for the new mobile-units fitted to vehicles which measure as they drive.

Your ticket gives you both the measured speed, and the speed you are being fined for .

At 40 kph over the limit the gendarmes/police take your licence away ( = temporary driving ban until you go to court ) and there will probably be a month ban, and at 50 kph they impound your car - unsure for how long, and can confiscate it if the offence is serious enough. Minimum fine outside town is € 68 and in a 50 kph limit € 135 with one point off your licence ( the system here is you start with 12 points and lose them for offences )

If you look at national politics, reducing road deaths is the only policy that has been a success since, say 2007, and therefore (all ) governments have kept the pressure on and policing is much tougher than it used to be. Macron's universal application of the 80 kph limit on single-carriageway roads hasn't yet proved to be the outright success that he had hoped, and it did have the unexpected effect of launching the "gilets jaunes " protest movement.

Not so much generous as fair, vehicle speedometers can be as much as 8% out so only a 5% margin would mean innocence motorist are penalised.

 

[mointainwalker]

UK law[/URL] is based on the EU standard, with some minor changes. A speedo must never show less than the actual speed, and must never show more than 110% of actual speed + 6.25mph.

So if your true speed is 40mph, your speedo could legally be reading up to 50.25mph but never less than 40mph. Or to put it another way, if your speedo is reading 50mph, you won’t be doing more than 50mph but it’s possible you might actually only be travelling at 40mph.=
/QUOTE]

https://www.thecarexpert.co.uk/how-accurate-is-a-car-speedometer/

If this opens ok for you, you will see that your answer is not correct ( if you believe this site )

 

[rsgaz]

this site

Their information is out of date. It is 10% plus 4kmh (2.5mph) for speedometers, not 6.25mph.

See rule 5.4 of...

https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:42018X1857&from=EN

 

[mointainwalker]

Kudos to you for wading through that verbiage. I couldn't find it, but believe you. Presumably though, that is -0/+10% plus 4kmh ?

 

[foxhole]

If this opens ok for you, you will see that your answer is not correct ( if you believe this site )

I think we all know how accurate , or not, the manufacturers are with their info.
According to then speedo on my old 1.6 cortina it could do 125 mph.!!!!!!

 

[rsgaz]

Presumably though, that is -0/+10% plus 4kmh ?

Yes, it must not under-read.

 

[motorbiking]

In France they have sensible speed limits. Most A roads have a 90/110/130km limit, unlike the UK where they are increasingly set to 40-50mph.
In the UK Guidelines for considering prosecution are 10%+2mph but you will be directed to speed awareness at up to 10%+9mph. There is a financial incentive for the police as they can recover a portion of the "training" costs, whereas if you get points and a fine the money goes to the treasury .

 

[mointainwalker]

In France they have sensible speed limits. Most A roads have a 90 .

Not any more . Since last autumn the limit on single-carriageway roads has been reduced to 80 and it is only 90 on dual-carriageway where there is a fixed, permanent central separation ( I'm unsure if this has to be a fence/wall or if an earthen strip counts ) Some dual-carriageways do have different limits up to 110 kph, individually signed.

 

[Avocet]

I think we all know how accurate , or not, the manufacturers are with their info.
According to then speedo on my old 1.6 cortina it could do 125 mph.!!!!!!

Yes, but your old Cortina wouldn't have been type approved to those regs! The 6.25 MPH think is still in UK law for individually approved vehicles, but for "type" approved vehicles (pretty much any mass produced car), it's the 10% + 2.5 that they need to comply with. Also as has been said, they can't under-read at all, only over-read.

 

[JohnD]

In France they have sensible speed limits. Most A roads have a 90/110/130km limit, unlike the UK where they are increasingly set to 40-50mph.

Does that include roads with cyclists, pedestrians, milk floats and houses along them?

130kph (91mph) seems rather fast for that.

I see that by Western European standards, UK has a fairly low number of road deaths per population, whereas France is considerably higher. Perhaps this is because France is more sensible.

if their general limit for single-carriageway roads is now 80kph (50mph) then it is is more comparable to UK practice. In a couple of years we shall see if it makes any difference.

 

[Munroast]

If it was up to me I would have the speed limit enforced to its posted figure, non of this grace of an extra few mph. It would be down to the driver to ensure his speedometer was accurate, and if you are unsure your speedometer was inaccurate then just drive a little slower. Remember the speed limit is a LIMIT, not a target. And I would have non of this idiocy of these highly visible come bleeding obvious speed cameras. I would have 50x more of them and hide the buggers.

As for the fines - £200 for every mph over the multiplied by the weight of your vehicle in tons
33mph in a half ton car = £300
33mph in a 3 ton range rover = £1,800
33mph in a 44ton truck = £26,400


And then for environmental and safety reason I would reduce speed limits to 20 in built up areas and 40 on all other roads - cars are a catastrophe and we need to start waking up to the utter mess they are making.

 

[JBR]

If it was up to me I would have the speed limit enforced to its posted figure, non of this grace of an extra few mph. It would be down to the driver to ensure his speedometer was accurate, and if you are unsure your speedometer was inaccurate then just drive a little slower. Remember the speed limit is a LIMIT, not a target. And I would have non of this idiocy of these highly visible come bleeding obvious speed cameras. I would have 50x more of them and hide the buggers.

As for the fines - £200 for every mph over the multiplied by the weight of your vehicle in tons
33mph in a half ton car = £300
33mph in a 3 ton range rover = £1,800
33mph in a 44ton truck = £26,400


And then for environmental and safety reason I would reduce speed limits to 20 in built up areas and 40 on all other roads - cars are a catastrophe and we need to start waking up to the utter mess they are making.

Presumably, such speed limits would not apply to bicycles.

 

[Avocet]

Does that include roads with cyclists, pedestrians, milk floats and houses along them?

130kph (91mph) seems rather fast for that.

I see that by Western European standards, UK has a fairly low number of road deaths per population, whereas France is considerably higher. Perhaps this is because France is more sensible.

if their general limit for single-carriageway roads is now 80kph (50mph) then it is is more comparable to UK practice. In a couple of years we shall see if it makes any difference.

No, 130 kph is about 80 mph. I've never quite seen the sense in quoting deaths per 100,000 of population because it gives places like Norway and Sweden (where hardly anyone lives) an unfair advantage. If you only had a country where (say) 50 people lived, they could all drive like absolute loonies and probably never hit each other or a pedestrian. If you live somewhere like the UK which is very densely populated, you get hammered. To my mind, deaths per 100,000 vehicle-miles (or km) is a much more sensible measure, but deaths per 100,000 vehicle-JOURNEYS is even better. Sadly, nobody uses the latter....