Laser speed detection questions

[JamesB]

I reckon an idea would be to find a light globe for the headlights that in addition to emitting normal light, also emits strongly around 940nm infrared spectrum which is what most of the LIDAR's work on. If you were emitting your own 940nm radiation, Id assume that the receiver in the LIDAR unit would get pretty confused.

I've often thought that a bank of pulse modulated IR LEDs (all running at a different pulse and duty cycle rates) mounted at the front of a car would do a great job at confusing the input stage of LIDAR units.

[fury]

http://www.budget.vic.gov.au/CA25713B0016B131/WebObj/2006-07BudgetPaper4Chapter3/$File/2006-07%20Budget%20Paper%204%20Chapter%203.pdf

Exactly..

Government has too much at stake these days to allow these things to be challenged.. in fact I know the VIC Government would be (more?) bankrupt, is it makes up such a large amount of state budget these days. $400M+ --

http://www.budget.vic.gov.au/CA25713B0016B131/WebObj/2006-07BudgetPaper4Chapter3/$File/2006-07%20Budget%20Paper%204%20Chapter%203.pdf

Page16 in the PDF.. I only speak for VIC as I used to live there for 25 years, and imo is the worst state of affairs in the country when it comes to enforcement. Unfortunately, it is probably where the rest of Australia will be heading soon enough, if it hasn't already in NSW, etc.

They actually have increased targets for revenue from 'traffic enforcement' each year if they need more money, which imo is a total corrupt way to run the system - when the focus is *meant to be* saving lives, not collecting more money.

Likewise, there is no incentive for them to increase public transport patronage (or make it slightly less shithouse), as they make so much money of petrol tax, fines, tolls and road revenue. They are also locked into massive do or die contracts with the people that setup the toll roads to funnel a certain amount of customers through each day, or they suffer.

So instead, at the Federal level, Howard has to look towards lovely solutions such as Nuclear, rather than addressing much simpler measures to address pollution (and I'd argue stress for motorists!), such as State Governments doing positive action to reduce the amount of vehicles on the road each week.

[tinkerbell]

The width of the beam increases as the distance increases, and the units are designed to work within a margin of acceptable error that is quite big considering they are only measuring speed to the nearest whole km/h.

is it like this?

[Herve Villecha]

I've only used a LIDAR for a short time but it was simply a matter of pointing the thing in the direction of the car you're targetting, locking the red dot onto it and holding the trigger for 3 seconds to get the speed reading.

It's hardly a task requiring a sniper.

[oldcorollas]

LOL @ MS paint :D

no matter what the speed limits, people will always go that little bit above the speed limit cos they feel oppressed by being made to slow down to an arbitrary speed.
for example (above), setting cruise control to 10km above limit.
why not set to speed limit?

the obvious way to not get a ticket is to not be doing 80 in a 50 zone.. to not be doing 150 in a 100 zone, or even 110 in a 100 zone...

everyone always whinges about getting booked for exceeding the arbitrary speed limit (regardless if the limit is sensible or not), but if you took that approach to other laws, things get out of hand very quickly... (i only beat them up a little bit.. i only stole a little bit... i only smashed the windscreens of a few cars...)...

and many morons crash and die even when doing the speed limit... if the limit was lower they would be more likely to survive the accident (then again.. natural selection FTW as long as they don't take out innocents..)

footnotes: laser speed detection is designed to be almost foolproof (cop proof ) it is not hard to design them as such, and not hard for them to be used.

[kabab]

LOL @ MS paint :D

the obvious way to not get a ticket is to not be doing 80 in a 50 zone.. to not be doing 150 in a 100 zone, or even 110 in a 100 zone...

But the speed limits are so freakin slow they are more likely to kill you from boredom then save your ass...

Driving to Canberra from Sydney would be 100x better at 140km/h you would also take about 45min less...

[tinkerbell]

hmmm,

driving time reduced by 25%,

chance of injury/death in accident increased by 50*%

= 100 times better?

i think your maths might be slightly out?







*it is actually much higher, but dont know exactly. but 100-140 must be HEAPS, if 100-110 is 21% increase**


**http://www.transport.sa.gov.au/rss/c...sues/speed.htm

[oldcorollas]

But the speed limits are so freakin slow they are more likely to kill you from boredom then save your ass...

really?

are you that irresponsible to not concentrate on your driving when you are going at slower speeds? you should ALWAYS pay attention..
it is NEVER the speed which kills/maims you are others.... it is the sudden stop from a hgher speed that does more damage compared to a lower speed.
if there were NEVER ANY ACCIDENTS, then the speed limit wouldnt matter


or catch a fucking train..... :p

[kabab]

really?

are you that irresponsible to not concentrate on your driving when you are going at slower speeds? you should ALWAYS pay attention..
it is NEVER the speed which kills/maims you are others.... it is the sudden stop from a hgher speed that does more damage compared to a lower speed.
if there were NEVER ANY ACCIDENTS, then the speed limit wouldnt matter


or catch a fucking train..... :p

Oh come on you sit in you car and stare at the freaking boring ads landscape for 3+ hours, the road is suitable for doing 140km/h i don't see the point of 110km/h apart from making your trip take longer...

[kabab]

hmmm,

driving time reduced by 25%,

chance of injury/death in accident increased by 50*%

= 100 times better?

i think your maths might be slightly out?







*it is actually much higher, but dont know exactly. but 100-140 must be HEAPS, if 100-110 is 21% increase**


**http://www.transport.sa.gov.au/rss/c...sues/speed.htm

Yeah well i was making a slight exaggeration...

Well its not exactly remarkable that the faster you go the more energy there is I'm pretty sure everyone did year 8 physic's..

The human body was never really designed to go faster then what 10km/h anyway so perhaps we should reduce all the speed limits to reflect that?

The fact is the cars and roads are capable at traveling faster 110km/h on the majority of our freeways.

[tinkerbell]

The fact is the cars and roads are capable at traveling faster 110km/h on the majority of our freeways.

yes, as was proved by the person last night hitting the double ton on the F3 at 1am in the morning...

but should any person, in any car, at any time, in any conditions do it?

[oldcorollas]

The fact is the cars and roads are capable at traveling faster 110km/h on the majority of our freeways.

but evidently not all drivers, hence the lowest common denominator speed limits

there should never be a speedlimit at which a persons driving skill is especially called on to prevent them from crashing... since most people don't have "driving skills", they just turn the key and press the pedals a bit..

[kabab]

yes, as was proved by the person last night hitting the double ton on the F3 at 1am in the morning...

but should any person, in any car, at any time, in any conditions do it?

So was speed the only factor?

Was he drunk?
Fatigued?
In an irrational mental state?
Driving inappropriate for the conditions?
Was his car road worthy?

Unless the only factor in this accident was speed then there is not relevant.

[tinkerbell]

So was speed the only factor?

Was he drunk?
Fatigued?
In an irrational mental state?
Driving inappropriate for the conditions?
Was his car road worthy?

Unless the only factor in this accident was speed then there is not relevant.

:rotflol: :rotflol: :rotflol: :rotflol:

see, you assumed the person had an accident, LOLOLOL!

[oldcorollas]

if you crash, it means you couldn't stop in time.
if you are going slower, you can stop easier, so are more likely to stop in time.
if you are going slower but still can't stop in time, the damage is smaller
there is no mystery, except why people continue to die on roads for no reason.....

it is very uncommon for a crash to occur due to mechanical failure.