GPS speed tracking

[KWalkerM]

It's speedometer not odometer (broken odo is against federal law - at least when you go to sell it is)... If a speedometer was off by 5 or more mph that is highly unusual... 1-3 mph isn't uncommon...

any older vehicle with larger than stock tires or swapped drivetrains will usually have a faulty Speedo that's off by more than 5. just in my experience with crawlers. for instance my speedo maxes out at 85mph and when maxed im only going 71mph. this is with larger than stock tires and a yota with a chevy motor.

[LBDamned]

any older vehicle with larger than stock tires or swapped drivetrains will usually have a faulty Speedo that's off by more than 5. just in my experience with crawlers. for instance my speedo maxes out at 85mph and when maxed im only going 71mph. this is with larger than stock tires and a yota with a chevy motor.

Unless you are grossly oversized or geared way differnt, it normally won't be that far off... I've got slightly bigger than oem diameter wheels with shorter gears - it's off by a couple mph ( not uncommon) 14mph is very uncommon.

In any event, it won't you out of a speeding ticket - But might get you an inspection with more fines (depending on your mods).

[onefortheroad]

My radar detector works great, I usually get about a mile notice give or take. When it comes to laser it's useless, by the time it goes off they have tagged me. I drive a lot for work and have never had speeding ticket.
I drive a lifted truck with oversize tires and my speedometer is off 5mph according to my radar detector.

[kermit315]

My radar detector works great, I usually get about a mile notice give or take. When it comes to laser it's useless, by the time it goes off they have tagged me. I drive a lot for work and have never had speeding ticket.
I drive a lifted truck with oversize tires and my speedometer is off 5mph according to my radar detector.

How does your radar detector know how fast you are going?

[ldsnet]

The ONLY thing that will matter is if you have MOTION VIDEO with telemetry running in your vehicle that you can play for the judge for 10-15 minutes BEFORE you were pulled over (or when you entered the highway if shorter) that CLEARLY shows your speed, and the situation around you INCLUDING the officer pulling you over and the contact with Law Enforcement.

Remember you are calling the officer and his technology and training a liar. Judges don't like to hear that. Even with the perfect video that shows the officer is incorrect, I would still give you a 50/50% at a not guilty verdict.

Now "most" departments these days have video recorders in the cars. I wonder if you could get a copy of the video that shows what the officer saw and heard before your day in court. That might have the data you would need to raise reasonable doubt in the mind of the judge. (Good luck ever getting your hands on that video for traffic court)

[LBDamned]

^^^ this is not fact.... There are often many factors for each citation that May be used to defend. Every circumstance is different and I'm not going to go over the multitudes of examples - But saying video is the only thing that matters is absolutely not true.

[onefortheroad]

How does your radar detector know how fast you are going?

I'm not exactly sure, I'd have to grab the book. GPS?? It also tells me where red light cameras are located.

[kermit315]

I'm not exactly sure, I'd have to grab the book. GPS?? It also tells me where red light cameras are located.

Hmk, neat. What kind of detector do you have?

[Ron-Solo]

The ONLY thing that will matter is if you have MOTION VIDEO with telemetry running in your vehicle that you can play for the judge for 10-15 minutes BEFORE you were pulled over (or when you entered the highway if shorter) that CLEARLY shows your speed, and the situation around you INCLUDING the officer pulling you over and the contact with Law Enforcement.

Remember you are calling the officer and his technology and training a liar. Judges don't like to hear that. Even with the perfect video that shows the officer is incorrect, I would still give you a 50/50% at a not guilty verdict.

Now "most" departments these days have video recorders in the cars. I wonder if you could get a copy of the video that shows what the officer saw and heard before your day in court. That might have the data you would need to raise reasonable doubt in the mind of the judge. (Good luck ever getting your hands on that video for traffic court)

Unless things have changed, dash cameras are not constantly running. They come on automatically when the emergency lights are activated or the officer can manually override and start it. Some turn off when the emergency equipment goes off, some are manually turned off after shutting down the lights.

A lot of agencies don't use them because the storage requirements of the recordings can be massive.

[TRICKSTER]

Now "most" departments these days have video recorders in the cars. I wonder if you could get a copy of the video that shows what the officer saw and heard before your day in court. That might have the data you would need to raise reasonable doubt in the mind of the judge. (Good luck ever getting your hands on that video for traffic court)

That's a bit of a stretch. I would actually say that there are more departments that don't have them than do.

[onefortheroad]

Hmk, neat. What kind of detector do you have?

It's a beltronics gx65 pro series. I have bought some cheaper detectors in the past but you get what you pay for.

Its saved me a few times so its paid for its self. The one time I was pulled over by chp the Leo said he visually got me at 75. The Leo and I chatted for a bit and I mentioned my radar never went off. That's when he said he visually got my speed. Let me go with a warning. Even though I have a radar detector I don't drive too fast normally.

[KWalkerM]

Unless you are grossly oversized or geared way differnt, it normally won't be that far off... I've got slightly bigger than oem diameter wheels with shorter gears - it's off by a couple mph ( not uncommon) 14mph is very uncommon.

In any event, it won't you out of a speeding ticket - But might get you an inspection with more fines (depending on your mods).

im fully aware that it wont get me out of a ticket but 90% of the people I 4wheel with are off by ridiculous amounts that are on a curve based on speed.
I am just saying in my experience speedos are off more often than you run into.

mine is because my tach runs off a I6 and not the V8 dropped in. plus having over sized tires and different gearing.

and as for more inspections/fines CHP has a field day when I get pulled over, no mud flaps, license plate on the roof rack, no rear license plate light on the spare swingout, no offroad light covers, im pretty sure carrying a CO2 tank is also illegal but not 100%. the nice part about living in a small town is that I have yet to get ticketed for any of those things as they are usually just fishing for drunks on weekends, body roll imitating drunk driving sucks...

[SCZ]

This was actually litigated (using the car's gps) up through the first level appeal. GPS lost. This was in Sonoma County about two years ago.

I think this was the case... http://www.petaluma360.com/article/2...9998?p=1&tc=pg

IIRC.. they determined that while the GPS was giving an accurate average speed. But since he was pegged shortly after a stoplight.. he'd accelerated over the speed limit to maintain that average on his GPS.

Memory fuzzy.. too full of turkey to go read up.