speeding

In message , Tony writes

No. What you will get is done again for not having an accurate speedo - in addition to being done for speeding.

Borrow a GPS, time yourself over a known distance or get someone to drive at certain speeds in their car infront of you, and work out how far out your speedo is. If you have bigger than standard wheels/tyres on then your speedo will read lower than your actual speed.

I have a LWB S3 speedo on my SWB with bigger tyres and at 30mph actual speed it says about 25mph. likewise, at 40mph actual It reads just below 35.

I always try and find someone to follow through speed cameras (and match their speed or go slower) as it makes me feel safer!

Bigger tyres will make the speedo under-read the speed. Which is, AIUI, illegal under construction and use regulations.

And other speedo defects aren't going to get you out of it either.

If you have 7.50 tyres and the normal speedo, and had an indicated speed slightly over the limit, 36 sounds about right.

I don't recall the details, but there is apparently a little number on the front face which can tell you the speedo calibration.

You could probably do some calculations on how accurate your speedo is based on the 100 meter markers found on motorways and dual carriageways. Get upto

This won't help you in this case but at least you'll know for the future.

Paul

I remember seeing a program on the box about speeding. It basically says - all vehicles are allowed +/- 10% accuracy on the speedo (to do with tyre wear, manufacturing tolerances etc). Then the general rule for the police is to allow the driver +2mph leeway on the upper limit. So for a 30mph limit you would be legally allowed to get away with doing

Stew.

how accurate is the speed displayed by a gps?

Regards. Mark.(AKA, Mr.Nice.)

Accurate enough for the courts here to accepted it as a defence a couple of weeks ago - bloke challenged the accuracy of a radar unit and won.

You're almost right. The tolerance for manufactured cars and their speedo reading is +10% not +/- All speedos should read at or below the actual vehicle speed. ie if your speedo reads 30 then you're doing 30 or less .. if you're doing 30 in real life your speedo might be reading 33 ... ;)

I have 31 x 105 BFFG AT's on my Disco and the speedo is now absolutely spot-on as checked with GPS .. with new stock tyres it underreads, as per the legal requirelments, by 5%.

Hum 37mph in lane 1 of a motorway is almost asking someone to shunt you. B-)

Be a bit safer to make it 90kph (55mph) and 10 posts in 45sec or 15 in

how did he prove that his gps was showing x speed? did he simply kick-up a fuss based on what his gps told him and forced them to check the calibration of the radar? interesting that..

Regards. Mark.(AKA, Mr.Nice.)

Just bend over and accept it like a man, and think of all of the times that you were n't caught.

Speeding???

Now thats DEFINATELY off topic for a landrover group!!!!!

;-)

Mr.Nice. wrote: >

I guess it was logging speed data. There's a link to the news article below - doesn't say much except he got off.

Sorry, but if you didn't exceed the speed limit then you wouldn't have got caught. I drive 60,000 miles a year and I have been caught twice before (Although I only have 3 live points on my licence). I know we all hate speed cameras but its a fact that speed does contribute to road deaths and I was driving too fast - It taught me a lesson. I have a radar detector in the car still but now drive on motorways at no more than

Sorry if I am coming across less than sympathetic but if your speedo is bouncing and your tyres are not standard this will affect your speed and its your responsibility to sort these out.

Merry Christmas

Stu

Oh I dunno, I've been caught speeding 5 times in the last 10 years but they've only made it stick twice. Considering I've got three cars of varying capabilities the fact that all 5 times have been in the landy is quite surprising! No speed-trap detectors in any cars either.

Provided satellite geometry and reception are good - much more accurate than any speedo since the Yanks dropped selective availability.

In Victoria a few months ago the driver of a Datsun 120 succeeded in proving in court that his car could not possibly have been doing the speed it was booked at (about 160kph I think). This resulted in the authorities admitting that there was no check on the accuracy of their cameras and the refund by the government of tens of million in fines. Not to mention the embarrassment for the government - especially when it was revealed that the contract to supply the cameras was awarded to a company that another government department already had on their black list. JD

On or around Tue, 14 Dec 2004 19:18:09 +0000 (UTC), "Stuart Adair" enlightened us thusly:

and of course, all speed limits are completely reasonable, sensible and entirely justified, based on the road, the amount of traffic, the weather...

Perish the thought that our masters would put up a 50mph limit on the open road for the express purpose of putting up a speed camera.

But I agree with the comment about getting caught. I often exceed speed limits, and touch wood I've not been caught. This is 'cos in addition to not speeding in stupid places like in towns I also keep a sharp eye out for police and speed traps.

IMHO, probably about 70% of the speed limits are reasonable inasmuch as any fixed limit can be reasonable. Probably about 25% are too low, and there are likely at least 5% which are too high.

but back to my first comment. The "safe"[1] maximum speed varies with many factors and as such a fixed limit is a poor solution at best.

but there's no such thing as safe. Some time back, a car was stopped at a roadworks traffic light, which was red, and was hit at speed from behind by a police vehicle which was engaged in "high speed driver training", resulting in the death of one of the occupants of the said car. I forget the details of the punishment, but it was something like 6 months ban from driving. wonder what I'd have got in the same circumstances?

SG: Don't confuse what the Police will allow you to do with what is legal. If the Chief Constable declares a zero tolerance attitude (as they did in Avon & Somerset for a while) then 31 in a 30 limit will get you a ticket.

As others have said already. The tolerance on speedo's is +10%, -0: if your speedo reads less than you're actually doing then it's illegal - it's one of the reasons very few speedos actually read zero when you're stopped. They often start at 5 or even 10mph.

Regards Steve G

Whilst I don't condone speeding under any circumstances and personally make every reasonable effort to ensure I don't speed myself, I do have some sympathy for those unfortunate enough to be caught on camera.

Just about your only GOOJF card is if the authorities took longer than

Regards

Steve G

T> S3 88"