What are your thoughts on "no tolerance" on speed

[fangsport]

This makes the claims that many speedos read 9KM higher than actual speed a little unbelievable.

our hilux ute is approximately 12% high if the solar powered speed signs are accurate, meaning the government are making a killing on RUC. and that is on factory tyre size but has done near on 300km, whereas my corolla with bigger tyres is bang on, but i suspect would be high if on correct rubber.

[snwtoy]

GPS, and those boxes on the side of the road both show I'm doing about 5km under the speedo's indication in the 2001 rolla.

[S T E A L T H]

Worn / underinflated tyres will cause the speedometer to OVERestimate your speed, not the other way around. If you're really concerned you could run nitrogen, then at least pressure will remain stable.

I haven't come across any cars at all where speedomoteres read lower than actual speed. In all cars (including ones I've had since brand new) the speedo would read 5-10km higher than GPS..

Much as I hate this idea and all the c0cksuckers behind it, using "speedometer error" as an argument against it is a waste of time. The main argument against it should be the fact that concentrating on speed enforcement as the only means of reducing the road toll is a joke and a means of avoiding the real issues while keeping the cash flowing one way from the public pocket into the consolidated fund.

[fangsport]

GPS, and those boxes on the side of the road both show I'm doing about 5km under the speedo's indication in the 2001 rolla.

so , you're saying those speed boxes are bang on??
i'm picking they should be, but maybe they are being 'wound down' to reduce speed??

[gt4dude]

when my speedo says 50 it reads 52 on those things that tell u to slow down.

That's cause Bridgestone doesn't make my size tyre anymore 215/50R16 can only get 215/55R16 and 225/50R16

Same thing when you go to larger mags and cant find an exact match rolling diameter, you end up going a few mm larger than stock on a 5% lower profile when going up 1 inch in wheel size, same for wider wheels and tread width.

It must be common with the amount of cars with mags larger than the stock wheels that the speedo under reads actual speed.

[Brick]

This makes the claims that many speedos read 9KM higher than actual speed a little unbelievable.

our hilux ute is approximately 12% high if the solar powered speed signs are accurate, meaning the government are making a killing on RUC. and that is on factory tyre size but has done near on 300km, whereas my corolla with bigger tyres is bang on, but i suspect would be high if on correct rubber.

im in the same boat,
GPS read 85kph when i was doing 100 on speedo.
Fixed it by putting bigger tires on back so less RUC(well actually correct RUC now)

[fangsport]

im in the same boat,
GPS read 85kph when i was doing 100 on speedo.
Fixed it by putting bigger tires on back so less RUC(well actually correct RUC now)

funny thing, on monday when i delivered the rally back to it's rightful owner (long story), there was such a small amount of traffic on the road, that at 90 on the speedo in the ute, i was passed by only 3 vehicles between carlton corner and waipara, considering was ambling along at around 75-80km/h

[Boosted_162]

when my speedo says 50 it reads 52 on those things that tell u to slow down.

That's cause Bridgestone doesn't make my size tyre anymore 215/50R16 can only get 215/55R16 and 225/50R16

Same thing when you go to larger mags and cant find an exact match rolling diameter, you end up going a few mm larger than stock on a 5% lower profile when going up 1 inch in wheel size, same for wider wheels and tread width.

It must be common with the amount of cars with mags larger than the stock wheels that the speedo under reads actual speed.

My swift was always reading at least 5km lower than my GPS ever since new, new wheels/tyres are within 1% rolling radius of stock so is still slower than GPS.

[KinLoud]

I have no problem with the proposed "no tolerance" policy. It's the law... the fact that there has been a tolerance at all in the past is a bonus.
Everytime I go over the speed limit I know I am breaking the law - so if I get caught I can't complain (No I don't have a radar detector).

Victoria (australia) will ping you for 1kph over the limit.
There are heaps of speed displays so you know exactly how accurate your speedo is = no excuse.

You talk to any emergency service person who has had to hose out a fatalilty.
The last thing they are thinking about is revenue from anyone who might have been speeding.

Ken

[Bling]

Don't really care about the tolerance deal, won't change my driving. Though near enough non-stop rain for 3 weeks puts me off going outside anyway

Levin is bang on for speed, work hiace reads 10% fast. 100=90 actual

[Mr Revhead]

There are heaps of speed displays so you know exactly how accurate your speedo is = no excuse.

Maybe in some areas, but others have none.
And who and how often are they calibrated? Seeing as the cops ones have to be done quite regulary......

[Malcolm]

We have a 2010 commodore at work which we use for various fuel economy/emissions testing purposes, and I spent a decent amount of time investigating the accuracy of the speedo when we first got it. The interesting thing is that the digital speedo display is programmed to always read 2km/h higher than what the ecu/trip computer thinks the car is doing (as read over the OBDII port or from the trip meter).

The speed reported over OBDII port is within 1km/h at 100km/h (verified on a dyno and with GPS)

[snwtoy]

GPS, and those boxes on the side of the road both show I'm doing about 5km under the speedo's indication in the 2001 rolla.

so , you're saying those speed boxes are bang on??
i'm picking they should be, but maybe they are being 'wound down' to reduce speed??

Yeah who knows if they're correct. They do seem to be consitent though, no matter which one I drive past the difference between my speedo and the box is the same.

[Mr Revhead]

Hmmmm yeah there were two in Wellington that I drove past that gave 2 different readings, about 3kmh difference to each other

[Boosted_162]

The one outside my work seems to be broken more often than it works

[rolla_fxgt]

Yes if you speed you are breaking the law, if even only going 0.1kmh over the posted limit. But it comes down to being practical, the old 10% lee way, not the 10k lee way was a good system.
At 50 it meant you could go up to 55 without worrying analy about the speedo, and taking your eyes off the road. At 100 it meant you could go to 110 without having to be an eagle eye on the speedo.

The difference between 104 and 105 is so minuscule, not to mention read (unless you have a digital speedo), it is bad policy to mandate it as the limit, and in my eyes leads to worse road safety, as people aren't looking at the road, they're looking at the speedo.

All the research shows that this is the case when speed limits are rigidly enforced.

The police have tough enough job as it is, without making more of the public dislike them.

Personally I think its a move just designed to soften us up for lower alcohol limits down to 0.5.

[GDII]

I used to have 205/50/R15 and my speedo was reading 4-5kmh out so I had to go faster to be at the right speed. The car is ment to have 205/60/R14s but now has 225/50/R15s and it reads exactly on what one of the solar powered signs say. I drive past 3 different ones and they all read different. One is in a 50 zone buy everyone goes 60. It's like there are invisible 60 signs each of Mana suburb. It's a great nesting spot for cops because of a big cliff on a corner that you can't see around. Everyone must hate me because I drive at the speed limit when they don't.

[Al]

Its all a huge distraction to get your attention off the Emissions Trading Scam.

[KinLoud]

Warwick - my comment was about about speed displays in Victoria not in NZ

Ken

[soopachargen]

it amuses me how the speed signs up here only go up to 50, so once you are going 51 its says "your speed... SLOW"