Speed Camera Tolerances and Speedo Accuracy

[Srdl]

Interesting piece from Auto Express today

https://www.autoexpress.co.uk/car-n...speedo-accurate?amp&__twitter_impression=true

 

[sl500amgsport]

Interesting piece from Auto Express today

https://www.autoexpress.co.uk/car-n...speedo-accurate?amp&__twitter_impression=true

Exactly my understanding which is why my cruise is set between 77 and 80 on clear Motorways, never been ticketed in 38 years.

Mercedes SL500 R231

 

[John Laidlaw]

Exactly my understanding which is why my cruise is set between 77 and 80 on clear Motorways, never been ticketed in 38 years.

Mercedes SL500 R231

Until today

 

[John Laidlaw]

Would be interesting to know the same tolerances or even if they exist on mobile speed cameras/speed traps? The fact those exist in some cases are in response to public complaints, therefore maybe the tolerances are less otherwise they may be caused of not doing their jobs?

 

[sl500amgsport]

Until today

If I do John will buy you a new set of batteries for your car

Mercedes SL500 R231

 

[John Laidlaw]

If I do John will buy you a new set of batteries for your car

Mercedes SL500 R231

Excellent

 

[LostKiwi]

Those allowances are pretty much in line with everything I've been told in the past.
The exception does seem to be mobile scamera vans. These seem to operate to much tighter tolerance. MrsLK some years ago was prosecuted for 32 in a 30.

 

[sl500amgsport]

Those allowances are pretty much in line with everything I've been told in the past.
The exception does seem to be mobile scamera vans. These seem to operate to much tighter tolerance. MrsLK some years ago was prosecuted for 32 in a 30.

Very unlucky I was pulled over doing 38 in a 30 zone by police using a speed gun, let me off with a warning as "an early Christmas present"..

Mercedes SL500 R231

 

[dmb007]

Many moons ago when taking the IAM driving test I was told to do 70 + 7 + 2,on the motorway, otherwise I may be failed by the examiner who was a serving police officer.

When I had a sat nav on my motorcycle the sat nav would show 27 mph the speedo 30 mph.

In my wife's 2015 c class the sat nav and speedo show the same speed. Are the speedos more accurate now?

 

[davemercedes]

I see on this list that West Yorkshire has 402 cameras which makes them the highest after London. I'm not aware of their traffic density but having argued many times that "Speed Kills" is not true, I'd really like to know if they have a smaller accident rate than the rest of the country?

 

[dry run]

I see on this list that West Yorkshire has 402 cameras which makes them the highest after London. I'm not aware of their traffic density but having argued many times that "Speed Kills" is not true, I'd really like to know if they have a smaller accident rate than the rest of the country?

Hmmm, - statistics.

If you tell me what result you would like the statistics to say, I'm sure I can come up with the "correct" input information

 

[PovertySpec]

ACPO guidelines are still 10%+2mph although those remain guidelines, you can still be prosecuted.

The plan to remove the 10%+2mph leeway was halted because speedos are still not accurate enough.

You are more likely to be prosecuted in built up areas but there's ample room to challenge borderline speeding charges because how can one tell if one is exceeding the speed limit if the speedometer can not?

 

[ernieh]

Many moons ago when taking the IAM driving test I was told to do 70 + 7 + 2,on the motorway, otherwise I may be failed by the examiner who was a serving police officer.

This isn't current IAM Advice, at least in Scotland. An examiner may overlook a couple of MPH above what is posted a couple of times, but as an IAM Observer, our advice is to drive to your speedo reading.

Ernie

 

[dmb007]

This isn't current IAM Advice, at least in Scotland. An examiner may overlook a couple of MPH above what is posted a couple of times, but as an IAM Observer, our advice is to drive to your speedo reading.

Did the car test a long time ago and did the motorcycle test early 2000s and at that time no mention of "extra speed" so looks like things have changed.