Failed License Test For One Km Over

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Originally Posted by Lotz-A-Landies

I think my point isn't clear. For any speed indicated on your speedo IT CAN NOT BE MORE THAN THE ACTUAL SPEED ON THE ROAD irrespective of any speedo error.

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Actually it is the exact opposite of what you are stating.

The car can not be travelling faster than the speedo says it is doing.

So actual speed 95 kph, speedo says 100 kph is OK and legal.

Actual speed 100 kph, speedo says 95 kph is not legal.

Actually, after re-reading what you said I think I get your point. I am talking about whether the car is in fact exceeding the speed limit, you are talking about what the speedo says, which can have up to 10% error, but is not taken into account.

Hi Dave

That is what the ADR say yes, but I have also been told by a blue slip examiner about the issue of the speedos being required to over read.

More than that, you only have to drive on the road and see the error on the speedo and the speed indicated on the GPS*. Then travel at the posted limit by your speedo (MY12 D4) and the velocity of the vehicles around you. More often than not you will find the majority of vehicles travelling close to what your speedo is indicating as the speed limit (and about 5kph below the GPS)

Does this not tell you something about the calibration of vehicle speedos by the manufacturers?

* When I go through the speedo test points on Victorian roads my GPS is almost invariably the same as what my speed is shown on the sign.

Hmmm the OP read it on the 2nd April, and it must have happened on yes you got it the 1st April..........just a thought.:banana:

Another point worth mentioning, by having the speedo (and thus odometer) read high, the fuel calculation by the on-board computer will also be fudged, making a 10L/100km dash readout up to 1L/100km out (worse if you factor in computer calculation error).

So when old mate's flash new whatever apparently gets less than "ten to the hundred" you can bet your bottom dollar it's higher.

And they get the car in for services 10% earlier and the warranty runs out 10% earlier.....it all adds up for them.

Yep!

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Originally Posted by Keithy P38

Another point worth mentioning, by having the speedo (and thus odometer) read high,

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I think you will probably find that the odometer is quite accurate, it is just the speedo which has the error (intentional).

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Originally Posted by BigJon

I think you will probably find that the odometer is quite accurate, it is just the speedo which has the error (intentional).

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Yep. ;)

Have actually checked this on mine. Odometer was virtually spot on, while speedo was about 6% over true speed when I had original tyres on.

Now that I've changed to slightly larger tyres, speedo is about 2% to 3% over true speed - but assume that odometer will now be slightly out - haven't checked it with new tyres on.

Regarding original post - both the driver and the instructor had only one speed indicator to go on - the speedo (regardless of how accurate it was).

If the speedo indicated that he was travelling at 1km over the posted limit, then technically he was speeding.

OK - 1km over the limit might be being a bit pedantic - but this was a driving test. My take on it is that if someone hasn't got enough between his ears to make sure that he sat below the posted limit during a driving test - well we're probably better off without him on the roads in any case.

Your 'Learners" used to be a Permit, and not a Licence, but now it is classed as a Licence.

If you can get nailed by a speed camera in Victoria for doing 1kph above the posted limit, then maybe he was doing the driver a favour by showing how important it is to not exceed the limit in order to preserve a Licence...

Maybe the driver was a 'know it all' / 'smart Alec' and that infraction was the perfect excuse to knock him off ? ;)

So this bloke/girl failed their driving test - whoopee, get better and do it again (you gigantic sook!)

Matt

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Originally Posted by Keithy P38

Another point worth mentioning, by having the speedo (and thus odometer) read high, ....

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Actually the speedo and the odometer are two separate mechanisms or electronic devices that use the same sensor to calculate their respective readings.

In the olden days when the speedo assembly was cable driven, the odo was a mechanical counter that merely added up the number of revolutions of the cable. The speedo on the other hand used a rotating magnet connected to the cable drawing a disk attached to the needle which was being retarded in its rotation by a spring. the odo tended to retain its accuracy while the speedo would change as the spring fatigued and dirt accumulated in the mechanism.