How far can a mobile Police camera van see when detecting speed?, does anyone know.
I was on the A19 today and about half a mile in the distance i saw a van in the layby slowed down to 68mph but may have been slightly higher than that
before slowing.
If it was a laser device (probably) then the range is about 1 mile if they had clear line of sight ......
Ian
Disappointingly the accuracy is pretty goid to a fair distance.
See http://www.ukspeedtraps.co.uk/speed1.htm
Not sure what the limit is but I got done at 600m distance 18 months ago. I checked at the time and found that to be within spec.
Got caught at 666 metres, and that was about seven years ago!
On the plus side, to get a ticket in a 70 zone, your speedo would have to read in excess of 85.
quote:
Originally posted by JoelP
On the plus side, to get a ticket in a 70 zone, your speedo would have to read in excess of 85.
quote:
Originally posted by JoelP
On the plus side, to get a ticket in a 70 zone, your speedo would have to read in excess of 85.
quote:
Originally posted by Alfa145
quote:
Originally posted by JoelP
On the plus side, to get a ticket in a 70 zone, your speedo would have to read in excess of 85.
That is incorrect. I got done at 81 on the gun and was not showing above 85 on my speedo, I was showing 82 (digital display)
It all depends how perfect your speedo is, if it's bang on then anything above 70 could get you a ticket.
how about 76 in a 70? acording to satnav gps speed which is more accurate than a speedo
The only accurate way you can tell how much its out by (Without special equipment) is to get someone to time you across a measurable distance at a
fixed speed. It can be quite a fun game to play if you are a passenger on a long motorway journey. Granted that's what your sat nav is doing but
how do you know how accurate it is?
on a side note I was told by a policeman that technically you are speeding if your speedo says you are, even if you aren't but they'd have
to be in the car with you to see that
A sat nav is reckoned to be accurate to 0.1mph...
...but it's all very well people saying "you can get away with 'x' over the speed limit", if you're followed by a police
car you can be done for anything over the limit, even 71mph in a 70mph zone, if he/she decides that your out of order for some reason.
Personally, I got caught a few years ago doing 59 in a 50 zone - absolutely my fault, no excuses - so nowadays I pay a lot more attention to my speed.
I've even set my sat nav to beep if I go over the limit. Amazing the number of times I've been saved a ticket by that feature!
It says in the LCB bible (AKA the IVA manual) that a speedo can read 10% over but 0% under, so that's where the concept of 20% out comes from,
10% off speedo inaccuracy then (supposed) 10% grace from the police. Personally I know my speedo is 10% out so I'll cruise at 75. If I get much
higher I'm then into the unknown area where I 'might' be ok, but driving a company car I can't risk it.
Before I got the company car, I got done by a camera van for 85 in a 70. I know I cut my speed as soon as I saw the glimmer of a parked up van so they
can definitely prosecute on line of sight even over a decent distance.
That 85 got me a £60 and 3 points, the 3 points made no difference at all to my car policy, my bike policy or my wife's policy (where I'm a
named driver on her car). I felt a bit put out by it being a car offence, but had to declare it on my bike policy...
The wife got points and a fine for doing 43 in a 40 area 
quote:
Originally posted by morcus
The only accurate way you can tell how much its out by (Without special equipment) is to get someone to time you across a measurable distance at a fixed speed. It can be quite a fun game to play if you are a passenger on a long motorway
Yep, just checked, it is 100 m, can evern ask govt where they are.
http://data.gov.uk/data-request/highways-agency-marker-post-id-locations-and-emergency-telephone-locations