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The Lowdown on Lidar

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11–20 of 284 posts

Re: The Lowdown on Lidar

#11

Well, he fought with half science: he came up with a set of testable hypotheses, but didn't actually run any of the tests. I guess that's as scientific as cosmology :-)

It's not even half science, it's just a big slide deck of FUD padded with a healthy amount of entitlement.

Re: The Lowdown on Lidar

#12
Speed radars are good for speed traps, but not so great to prevent speed related incidents. They share the same fatal flaw with all other single-point speed meters: You can just slow down for a minute, while you pass by the speed trap, and then speed up for the rest of your trip. Instead, a 2-point speed meter (i.e. license plate readers every few miles, measuring time between matching reads) system is superior because a) their margin of error is negligible and b) they measure sustained speed over a long distance rather than at a single hot spot, thus making roads safer. I can't believe it's not implanted at least in all interstate freeways.

Re: The Lowdown on Lidar

#13
post #9

Can anyone tell me why speeding tickets aren't enforced with video cameras (like red-light tickets are)? It would seem to be much more accurate, much easier to enforce, and much harder to dispute. Irrespective of the rights or wrongs of speed limit laws, I do believe that consistent and efficient enforcement can only be a good thing.

Speeding would require the police to record/archive video, vs. just a single photo which contains both your car being behind the white line and the red light.

Also, the red light ticketing programs are often administered by private companies, without officers being involved. Speeding ticket video would need to recorded by the police.

All that said, I think its a great idea and the obstacles can surely be worked out.

Finally, a tip: if you are ever pulled over and you plan to dispute the arrest, request the officer's dashboard video ASAP. This will ensure it is preserved and available for you at trial; if you don't request it quickly enough it might not be available when you do. Don't count on it being around even a week - request it the very next day.

Re: The Lowdown on Lidar

#14
post #9

Can anyone tell me why speeding tickets aren't enforced with video cameras (like red-light tickets are)? It would seem to be much more accurate, much easier to enforce, and much harder to dispute. Irrespective of the rights or wrongs of speed limit laws, I do believe that consistent and efficient enforcement can only be a good thing.

Because video cameras are arguably illegal. You can't face your accuser in court, therefore it should be thrown out.

Got a speeding ticket from one of these lovely cameras in the state of Iowa, then I was sent a bill from some company in Phoenix with bold threats that if I didn't pay the fine, it'd be submitted to a collection agency and negatively impact my credit score (because otherwise I'd just have not paid it. I'd happily live the rest of my life without ever entering Iowa where they could arrest me with a bench warrant)

It's corrupt, illegal and immoral. However, since I (like most people, I'd wager) don't have the time nor energy to fight, I paid my $200 fine and moved on.

Re: The Lowdown on Lidar

#15
post #9

Can anyone tell me why speeding tickets aren't enforced with video cameras (like red-light tickets are)? It would seem to be much more accurate, much easier to enforce, and much harder to dispute. Irrespective of the rights or wrongs of speed limit laws, I do believe that consistent and efficient enforcement can only be a good thing.

The goal of speeding tickets is revenue generation not lowering speeds. It's essentially random taxation on people who drive quickly.

Because of that they need mobile, disguisable, hand held units. Video from a handheld unit wouldn't be great for determining speed.

Now, they could easily create combination LIDAR-Video boxes and mount them above traffic for clear speed calculations. But then people would learn where they are and drive slowly at that location so it wouldn't generate any revenue.

In fact it might actually cause accidents because drivers might slam on the breaks when they get close.

Re: The Lowdown on Lidar

#16

Speed radars are good for speed traps, but not so great to prevent speed related incidents. They share the same fatal flaw with all other single-point speed meters: You can just slow down for a minute, while you pass by the speed trap, and then speed up for the rest of your trip. Instead, a 2-point speed meter (i.e. license plate readers every few miles, measuring time between matching reads) system is superior becau…

The fundamental reason is because drivers feel entitled to speed and most voters are drivers. People with expensive cars further believe they've paid for the privilege of violating more laws more often, and those people are also more influential in policy setting.

There are lots of expressions of this fundamental reason, such as people throwing a fit about automated license plate reading in the name of privacy. But our all boils down to the fact that a person turns into a sociopathic scofflaw as soon as he gets behind the wheel.

Re: The Lowdown on Lidar

#17
post #9

Can anyone tell me why speeding tickets aren't enforced with video cameras (like red-light tickets are)? It would seem to be much more accurate, much easier to enforce, and much harder to dispute. Irrespective of the rights or wrongs of speed limit laws, I do believe that consistent and efficient enforcement can only be a good thing.

In Ireland we have a system where you can contest any of these automated fines in court. The problem is that the fines and penalty points double should you contest and lose. http://en.wikipedia.org/wiki/Penalty_points_in_Ireland

Re: The Lowdown on Lidar

#18
post #9

Can anyone tell me why speeding tickets aren't enforced with video cameras (like red-light tickets are)? It would seem to be much more accurate, much easier to enforce, and much harder to dispute. Irrespective of the rights or wrongs of speed limit laws, I do believe that consistent and efficient enforcement can only be a good thing.

One word: Discretion "Confronting Automated Law Enforcement" http://robots.law.miami.edu/wp-content/uploads/2012/01/Shay-...

That's a pretty short summary of a 44 page document. Can you elaborate a little more?

Re: The Lowdown on Lidar

#19

Well, he fought with half science: he came up with a set of testable hypotheses, but didn't actually run any of the tests. I guess that's as scientific as cosmology :-)

I think all he way trying to say that there are ways that a LIDAR gun could give a false reading, and there's no current incentive for law enforcement/manufacturers to ensure accuracy. In fact there's an incentive for both the manufacturer to emphasise accuracy based on successful prosecutions, and for police to emphasise accuracy to prevent large-scale contesting of tickets.

They are used for law-enforcement, but presumably aren't available for public scrutiny, especially around 'proprietary' algorithms. As mentioned, they can get firmware updates that change behaviour, yet that doesn't make it out into "does this mean it was mis-behaving before, therefore I should dismiss tickets issued in situation X".

It's similar in some ways to vote counting machines. If they are used in public elections, then the inner workings should be available for introspection to ensure correctness.

Re: The Lowdown on Lidar

#20
post #14
post #9

Can anyone tell me why speeding tickets aren't enforced with video cameras (like red-light tickets are)? It would seem to be much more accurate, much easier to enforce, and much harder to dispute. Irrespective of the rights or wrongs of speed limit laws, I do believe that consistent and efficient enforcement can only be a good thing.

Because video cameras are arguably illegal. You can't face your accuser in court, therefore it should be thrown out. Got a speeding ticket from one of these lovely cameras in the state of Iowa, then I was sent a bill from some company in Phoenix with bold threats that if I didn't pay the fine, it'd be submitted to a collection agency and negatively impact my credit score (because otherwise I'd just have not paid it.…

Its just extortion, not even law enforcement.

"We saw you do this, pay us $50 and it goes away. No insurance report, no evidence, nobody knows."

Law enforcement does this all the time, so does the mob. Its not even worth it to fight it (economic speaking), the time you'll spend out of work, stressed, etc. Then if you get a lawyer involved. You'll end up spending >$300 in time and money to not spend $50.

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