Jump to content
SAU Community

Speed Gun Accuracy

Lwood

By Lwood,
in Queensland

 Share

Recommended Posts

Lwood Collaborator

Lwood

Posted
Posted (edited)

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

Popular Days

Top Posters In This Topic

Popular Days

willL Experienced

willL

Posted
Posted

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..

Imtorqing Community Regular

Imtorqing

Posted
Posted
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..

BstewyR33 Community Regular

BstewyR33

Posted
Posted (edited)

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
Col-GTSX Grand Master

Col-GTSX

Posted
Posted

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...

Imtorqing Community Regular

Imtorqing

Posted
Posted
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)

willL Experienced

willL

Posted
Posted
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..

astrotristan Grand Master

astrotristan

Posted
Posted
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

Sexual_32 Proficient

Sexual_32

Posted
Posted

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.

astrotristan Grand Master

astrotristan

Posted
Posted
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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      This car has run before on this z32 ecu can get the part number for you, I have tried with no AFM it didn’t change anything, I compression tested today 140-150 across all 6 cylinders, also set fuel pressure to 43psi. The only weird thing was cylinder 1 plug was black and fouled other 5 cylinders were just wet with fuel. Spun cas by hand and confirmed injectors are clicking 
    • MBS206
      new 1.5 LSD issues/concerns

      By MBS206 · Posted

      Since you came here to ask for help, have you thought about answering our questions, that might help us lead you to why it was skipping, or have you given up on getting advice?
    • GTSBoy
      new 1.5 LSD issues/concerns

      By GTSBoy · Posted

      A 1.5 way is a 2 way. It is just a 2 way with a less aggressive ramp on overrun.
    • GTSBoy
      Boost cut after swap(RB25DET NEO) R34

      By GTSBoy · Posted

      The ABS and/or TCS being missing/broken will not cause the engine to misbehave. It just casues CEL to come on and annoy you. The CEL is useless if it is always on, so you have to do the things you have to do to get rid of it, so it can be useful. Being a Stag ECU, then yes, it will not expect TCS to be present. But it will expect ABS to be present and working. You will need to either make the ABS CU talk to the ECU (don't ask me what that will take on an NA R34), and make sure the hardware is working....or, you just need to blank it out in Nistune. Do not persist with the stock ECU. You will just have problems. Gte it Nistuned. Start from there. DO YOU HAVE A BOOST SENSOR? The ECU's boost sensor that it. It is connected to the loom at the rear of the coil cover. Usually rides on the firewall on an R34, but is usually bolted down to a bracket along with all the other crap at the back of the coil cover when a Neo is dropped into another car. If you do not have it, the ECU will shit the bed. So, do you have one?
    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      So sadly the fuel pump etc was not it. The pump and filter is new and it is still cutting around 4000 rpm. A read something about ABS/TCS (engine is from stagea and ECU too so no TCS) and i dont know for 100% that my car has ABS. It has ABS "cube" in engine bay but i dont think it works(or at least from my braking experience). Can be something like that?  I will be driving the car next week to Nistune tuner to properly see what is wrong...  
×
×
  • Create New...