Jump to content
SAU Community

Recommended Posts

Got a speeding fine around 2 weeks ago 81 in a 60 zone, i've been told that the speed guns can be out by up to 3kms...

Is this true as i have been told that the cop has to take that into account when giving you the speeding fine, it said 81 on the gun and if i was doing 80 i would still have one point left and i wouldn't have to go on good behavior he also wrote down that i was on my opens when it clearly says that im a P plater and my car has p plates all over it.

Any help would be greatly appreciated,

Edited by Rhyses Pieces
Link to comment
https://www.sau.com.au/forums/topic/302132-speed-gun-accuracy/
Share on other sites

  • Replies 70
  • Created
  • Last Reply

Top Posters In This Topic

I know fixed speed cameras are definitely off by 3km, hence the reason for them taking off 3km of alleged speed when you receive the fine.

I don't believe it should be any different with a Laser Gun so if they are not taking off 3km I would fight it..

Got a speeding fine around 2 weeks ago 81 in a 60 zone, i've been told that the speed guns can be out by up to 3kms...

Is this true as i have been told that the cop has to take that into account when giving you the speeding fine, it said 81 on the gun and if i was doing 80 i would still have one point left and i wouldn't have to go on good behavior he also wrote down that i was on my opens when it clearly says that im a P plater and my car has p plates all over it.

Any help would be greatly appreciated,

I think you will find that speedo's are out by on average three to five kilometres not the camera's/guns.

Their accurate right down to the kilometer so 81 is 81 as they use a laser and good for anywhere up to 700 plus meters.

Take it to court(you still get done for 81 if u lose) or pay the fine and behave yourself on good behaviour or take the suspension. Mind you if you drive a modified car it is dicey to be on good behaviour as defects cost points.

Hope it helps..

read up on the australian standards for hand held radar guns that the police use. that should tell you all the info you need

but why are you trying to contest 3klms inaccuracy? - disregaurd that

you could proberbly get off in court due to the police writing down your on opens when your actually on your P's - that might be your only ground to stand on, you'll still cop the 20k's over speeding fine

Edited by BstewyR33

writing down open when your on p's means nothing...

they will simply re-issue the ticket with another 30 days to pay it...

dates, spelling does not matter a mistake will simply be corrected and a ticket sent in the mail...

as for accuracy, fixed speed cameras use line markings on the road to calculate speed in a meters per second equation. The computer than turns the meters per second into a kilometers per hour reads and bobs ya uncle you got a fine. It works the same way as the speed trap at the drag strip, your trigger the first beam and then the computers counts time until you trigger the second beam and from this reading calculates a kph/mph reading...

So fighting a fixed speed camera fine would be like fighting danny green for a ice cream... They simply produce the two photos and explain the mathematical equation...

As for laser guns, in my experience working with the QPS ive found their very accurate... They can detect a speed as low as 15kph from up to 1km away... To issue you a fine of 81 in a 60 zone the radar must be locked on you for no less than 40metres, which means you were given a very accurate reading/ticket...

So you must have been going 80ish...

Lets say your right and you were going say 79kph... Your still 19kph over the limit, a court is going to smash you over it... If you say yeah i was speeding but i reckon i was going 1 or 2 kph less than the ticket was issued for the court is not going to help you... They will see your trying to avoid a larger demerit and through it out at your cost... Speeding is speeding you have to cop it on the chin and move on, dont do it again...

thanks for all the info fellas, i'll just take the fine. Need to keep an eye on the speedo next time

Or get an overspeed alert lol They were annoying in earlier commodores and on GPS's (A mate turned a work car's on and I was like whats that Fuc^&ing beeping)

lol ... Pretty sure that 3ks isn't going to make a different when your doing 20ks over ...

These topics should be banned ;)

40km/h over the speed limit = 6 months loss of license in Vic

if you were doing 42km over the limit then 3'ks is going to make a huge difference.

that is what he is fighting for..

Got a speeding fine around 2 weeks ago 81 in a 60 zone, i've been told that the speed guns can be out by up to 3kms...

40km/h over the speed limit = 6 months loss of license in Vic

if you were doing 42km over the limit then 3'ks is going to make a huge difference.

that is what he is fighting for..

huh? where did 42 come from

If its a hand held radar then they need to be recalibrated a fair bit.. you could ask to see when it was last recalibrated.. but i have no idea how often they need to be done.. I'd say ur fighting a losing battle.. that n the front of the courier mail didnt help today.

im using it as an example to demonstrate how important only a few km's can mean..

my mistake :blink:

If its a hand held radar then they need to be recalibrated a fair bit.. you could ask to see when it was last recalibrated.. but i have no idea how often they need to be done.. I'd say ur fighting a losing battle.. that n the front of the courier mail didnt help today.

steve havnt seen you around here in ages

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I think the concept is highlighting the various scenarios where thicker oil helps, and thicker oil potentially doesn't help and only generates heat and costs power, in turn for safety which isn't actually any safer (unless you're going real hot). If anything this does highlight why throwing Castrol 10w-60 for your track days is always a solid, safe bet. 
    • Jason should have shown a real viscosity vs temp chart. All the grades have very little viscosity difference at full operating temperature.
    • Oops... I meant to include the connector  view... BR/W - power from fuse L/W - motor negative to fan control amp (and off to HVAC pin19) OR/B - PWM signal (from HVAC pin20) B --  ground  
    • Yep, if you are applying filler it sounds like there is something wrong with the body lol. Safe to assume there is going to be a lot of sanding going on if your still applying fillers.  Picture a perfect bare metal panel, smooth as glass. You lay down your primer, it's perfect. (why are you going to sand it?) You lay down the colour and clear, it's perfect. No sanding at all took place and you've got a perfectly finished panel.  You won't be chasing your tail, sounds like you were prepping to start laying filler. If your happy with the body after the sanding, there is some bare metal exposed and some areas with primer, no issues at all, start laying the filler. You are safe to lay filler on bare metal or primer (of course check your technical data sheet as usual for what your filler is happy to adhere to).  This isn't a 100% correct statement. There is primer that is happy to adhere to smooth bare metal. There are fillers that are happy to adhere to smooth bare metal. Just make sure you're using the right materials for the job.  Typically if you are using filler, you would go primer, colour and clear. I've never seen any instances before where someone has laid colour over body filler (maybe this happens, but I haven't seen it before). So your plan sounds pretty normal to me. 
    • I don't think there's any way someone is push starting this car.. I honestly can barely move it, and moving it and steering it is just flat out not possible. I'm sure it is, but needs a bigger man than me. I have a refurbished starter now. The starter man was quite clear and consise showing me how nothing inside a starter really should contribute to slow cranking, and turned out that for the most part... my starter was entirely fine. Still, some of the wear items were replaced and luckily it didn't show any signs of getting too hot, being unfit for use, etc. Which is 'good'. I also noticed the starter definitely sounded different, which is a bit odd considering nothing should have really changed there.... Removed and refit, and we'll pretend one of the manifold bolts didn't fully tighten up and is only "pretty" tight. GM only wants 18ft/lb anyway. I also found a way to properly get my analog wideband reading very slightly leaner than the serial wideband. There's Greg related reasons for this. The serial output is the absolute source of truth, but it is a total asshole to actually stay connected and needs a laptop. The analog input does not, and works with standalone datalogging. Previously the analog input read slightly richer, but if I am aiming at 12.7 I do not want one of the widebands to be saying 12.7 when the source of truth is 13.0. Now the source of truth will be 12.65 and the Analog Wideband will read 12.7. So when I tune to 12.7 it'll be ever so slightly safer. While messing with all of this and idling extensively I can confirm my car seems to restart better while hot now. I did add an old Skyline battery cable between the head and the body though, though now I really realise I should have chosen the frame. Maybe that's a future job. The internet would have you believe that this is caused by bad grounds. In finding out where my grounds actually were I found out the engine bay battery post actually goes to the engine, as well as a seperate one (from the post) to the body of the car. So now there's a third one making the Grounding Triangle which is now a thing. I also from extensive idling have this graph. Temperature (°C) Voltage (V) 85 1.59 80 1.74 75 1.94 70 2.1 65 2.33 60 2.56 55 2.78 50 2.98 45 3.23 40 3.51 35 3.75 30 4.00   Plotted it looks like this. Which is actually... pretty linear? I have not actually put the formula into HPTuners. I will have to re-engage brain and/or re-engage the people who wanted more data to magically do it for me. Tune should be good for the 30th!
×
×
  • Create New...