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https://www.boards.ie/discussion/2055940817/signature-rules

How close to go safe van before your caught

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Comments

  • #32
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    corkgsxr wrote: »
    Unless your speedo was gps fed its impossible to get it accurate. Tires are different size between brands, even tire wear will affect it. There are loads of stuff that affect a speedo. If a speedo isnt accurate they need a % to ignore so after that your definitely speeding
    corkgsxr wrote: »
    10% both ways. Your speedo could be under reading too. Thats why I used to use the gps to do it without guessing what the speedo is doing
    Speedos are allowed to overread, but not to underread. This is why almost all car speedos read 5-8% more than the actual speed.


  • #33
    corkgsxr
    Registered Users, Registered Users 2 Posts: 3,404 ✭✭✭corkgsxr


    Fair enough but iv always stayed at the 10% extra and never got a ticket. And id pass at least one a day


  • #34
    pippip
    Registered Users, Registered Users 2 Posts: 2,251 ✭✭✭pippip


    corkgsxr wrote: »
    Fair enough but iv always stayed at the 10% extra and never got a ticket. And id pass at least one a day

    well now we know your lying :D


  • #35
    two wheels good
    Registered Users, Registered Users 2 Posts: 1,957 ✭✭✭two wheels good


    corkgsxr wrote: »
    10% both ways. Your speedo could be under reading too.

    Not so. The indicated speed must never be less than the actual speed. Otherwise we'd all be blaming the car manufacturer.
    (There's also some limit imposed on the permitted error on the over-reading.)


  • #36
    ironclaw
    Registered Users, Registered Users 2 Posts: 8,004 ✭✭✭ironclaw


    So much of this thread is utter nonsense, hearsay and pub talk. Especially the bit about seeing it in the distance and going in another direction, and Garda cars with 300m range. If you want to defeat these things at least understand the tech involved and it's limitations. It's not difficult.


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  • #37
    efc67
    Registered Users, Registered Users 2 Posts: 268 ✭✭efc67


    How accurate are the signs which say slow down watch your speed and tells you what your current speed is......there is one on the N11 in Wicklow.....and i always get my speedo bang on 80km/h .....but the sign always displays 72km/h


  • #38
    mikeecho
    Registered Users, Registered Users 2 Posts: 5,366 ✭✭✭mikeecho


    Long and short of it:

    The Camera and Radar beam are angled at 22º across the road.
    The radar spreads at 4.5º

    (can someone do the maths please)

    You must be within the radars beam for a speed to be taken.
    The picture is taken at the same time.
    The picture is actually a still, as the camera is a video camera.





    broken_record_r1_c1.jpg


  • #39
    gbob
    Registered Users, Registered Users 2 Posts: 522 ✭✭✭gbob


    efc67 wrote: »
    How accurate are the signs which say slow down watch your speed and tells you what your current speed is......there is one on the N11 in Wicklow.....and i always get my speedo bang on 80km/h .....but the sign always displays 72km/h

    Because as already stated here your car speedo can overread by up to 10%.. ie sign shows your actual speed vs speedo's inaccurate reading.


  • #40
    ironclaw
    Registered Users, Registered Users 2 Posts: 8,004 ✭✭✭ironclaw


    mikeecho wrote: »
    Long and short of it:

    The Camera and Radar beam are angled at 22º across the road.
    The radar spreads at 4.5º

    (can someone do the maths please)

    You must be within the radars beam for a speed to be taken.
    The picture is taken at the same time.
    The picture is actually a still, as the camera is a video camera.

    Thank you for summing it up as has been down countless times here. There is a decent video on YouTube if someone wants to look it up.

    Really roughly, the Maths equates to, if the van is monitoring a 10m (~30ft) wide section of road (i.e About the width of an average two land N road), you'd have to be closer than 24.75m (~75ft)

    Bear in mind between 80 to 100km/h you'll cover that distance in just about a second.

    So in other words, you should in theory have about 3 seconds (i.e. 100m) to see it, slow down and pass it as under no reasonable circumstances are you going to turn a corner and it to be 'just there'
    gbob wrote: »
    Because as already stated here your car speedo can overread by up to 10%.. ie sign shows your actual speed vs speedo's inaccurate reading.

    Because your speedo is over-reading. Most car speedo's over-read the faster you are travelling. No car speedo, as has been said, will ever give you a speed faster than you are travelling. Thats in EU law. If you car does this its not to spec.

    For instance, below 50km/h my car is dead on. 63km/h (Speedo) is 60km/h true speed. 125km/h is 120km/h true speed. I personally wouldn't allow 10% as in most cars its far closer to 5%. I would doubt any car would over read by 10% with stock tyres etc.

    The reason Uncle John wasn't pulled for doing 110km/h in a 100km/h zone was probably because he was doing about 102km/h in reality. GoSafe Vans have a 3 to 4km/h tolerance I'm lead to believe. So in my case, at 111km/h in a 100km/h zone I'd be right on the margin (I wouldn't however do this, far to close cut)

    If anyone really wants to get the most out of their car in this country (Speedwise) you'd probably be wise investing in a proper GPS trip computer. Most are accurate to +/- 0.22km/h. An iPhone or similar is probably close to +/- 1km/h


  • #41
    gbob
    Registered Users, Registered Users 2 Posts: 522 ✭✭✭gbob


    ironclaw wrote: »
    Thank you for summing it up as has been down countless times here. There is a decent video on YouTube if someone wants to look it up.

    Really roughly, the Maths equates to, if the van is monitoring a 10m (~30ft) wide section of road (i.e About the width of an average two land N road), you'd have to be closer than 24.75m (~75ft)

    Bear in mind between 80 to 100km/h you'll cover that distance in just about a second.

    So in other words, you should in theory have about 3 seconds (i.e. 100m) to see it, slow down and pass it as under no reasonable circumstances are you going to turn a corner and it to be 'just there'



    Because your speedo is under-reading. Most car speedo's under-read the faster you are travelling. No car speedo, as has been said, will ever give you a speed faster than you are travelling. Thats in EU law. If you car does this its not to spec.

    For instance, below 50km/h my car is dead on. 63km/h (Speedo) is 60km/h true speed. 125km/h is 120km/h true speed. I personally wouldn't allow 10% as in most cars its far closer to 5%. I would doubt any car would over read by 10% with stock tyres etc.

    The reason Uncle John wasn't pulled for doing 110km/h in a 100km/h zone was probably because he was doing about 102km/h in reality. GoSafe Vans have a 3 to 4km/h tolerance I'm lead to believe. So in my case, at 111km/h in a 100km/h zone I'd be right on the margin (I wouldn't however do this, far to close cut)

    If anyone really wants to get the most out of their car in this country (Speedwise) you'd probably be wise investing in a proper GPS trip computer. Most are accurate to +/- 0.22km/h. An iPhone or similar is probably close to +/- 1km/h

    Your speedo is over reading.. it is showing your speed as being over actual speed therefore over reading.


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  • #42
    duinegorm
    Registered Users, Registered Users 2 Posts: 125 ✭✭duinegorm


    Is the picture of the reg not taken from the rear when you pass the van seeing as that's when the flash kicks in?


  • #43
    ShM
    Registered Users, Registered Users 2 Posts: 45 ✭ShM


    corkgsxr wrote: »

    If you were doing 110 in a 100 it wasn't you


    I was told before that there is a certain speed they alow over however,
    I got points for going 66 in a 60 zone :(


  • #44
    Gosub
    Closed Accounts Posts: 874 ✭✭✭Gosub


    ShM wrote: »
    I was told before that there is a certain speed they alow over however,
    I got points for going 66 in a 60 zone :(
    Yes, but what speed did your speedo show?


  • #45
    ShM
    Registered Users, Registered Users 2 Posts: 45 ✭ShM


    Gosub wrote: »
    Yes, but what speed did your speedo show?

    I never looked at it at the time but i assumed i was doing what the sheet said that they sent me with the picture of my reg, sad times it was!:(


  • #46
    ironclaw
    Registered Users, Registered Users 2 Posts: 8,004 ✭✭✭ironclaw


    duinegorm wrote: »
    Is the picture of the reg not taken from the rear when you pass the van seeing as that's when the flash kicks in?

    You cannot see the flash. Its infrared. You may see a slight flash in certain lighting conditions and you may see a flash from a Garda van. However seeing / not seeing a flash is not a indication of whether you were caught or not.

    They take photos, from the rear of the van only, of traffic going in both directions (If applicable)


  • #47
    mikeecho
    Registered Users, Registered Users 2 Posts: 5,366 ✭✭✭mikeecho


    @ ironclaw

    is it time for an updated sticky ?

    I can do one up with your info/ pics, adding some tech specs.

    but I'm afraid the tech specs might confuse some, and irritate others who believe certain operations are calculated differently.


  • #48
    ironclaw
    Registered Users, Registered Users 2 Posts: 8,004 ✭✭✭ironclaw


    mikeecho wrote: »
    @ ironclaw

    is it time for an updated sticky ?

    I can do one up with your info/ pics, adding some tech specs.

    but I'm afraid the tech specs might confuse some, and irritate others who believe certain operations are calculated differently.

    Wouldn't do any harm. I'll do one up if you like and if you want to PM me any info.


  • #49
    deiseboy1377
    Registered Users, Registered Users 2 Posts: 2 ✭deiseboy1377


    vans don’t flash so I’d say you are ok it’s something else in the van that flash



  • #50
    bazz26
    Registered Users, Registered Users 2 Posts: 51,544 ✭✭✭✭bazz26


    should get 3 points and a fine for resurrecting 12 year old threads too. 🤣



  • #51
    Fr Tod Umptious
    Registered Users, Registered Users 2 Posts: 16,192 ✭✭✭✭Fr Tod Umptious


    https://www.boards.ie/discussion/comment/123392487#Comment_123392487

    Do you think the OP needs that assurance 12 years later?



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  • #52
    Jim_Hodge
    Registered Users, Registered Users 2 Posts: 12,098 ✭✭✭✭Jim_Hodge


    https://www.boards.ie/discussion/comment/123392487#Comment_123392487

    How do you wait 9 months between your first and second posts and then find a 12 year old thread to post it in? It's some achievement to have even found this thread.



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