Police detector

[3rd Strike]

anyone have any ideas of something you could use to detect police much like a fuzz buster...for putting in your pocket when walking around..maybe let it scan for police chatter on their frequency within reasonable range or something like that....any ideas would be helpful

[pyromaniac_guy]

it suck to count on such a device, then have a moment where you are doing something illegal, and johnnie law has his radio turned off :)

[PYRO500]

nah, they ALWAYS have their radios on wether or not they are using them. their radios have squelch control on them and most are just fm either in the low band region, somewhere around 400 mhz or are on uhf near the 800s the problem withdetecting chatter on the radio is that you'd need a very selecticve radio with sensitivity to a narrow field of signal strength and frequency that is hard to discriminate from background noise due to intermod and other radio transmitters now you could use a sensitive recever that would listen to the offset frequency when their double superhetrodine recevers receve a message they interfere with a certain frequency above and below the actual frequency the recever was tuned to witch is all determined on the IF frequency the radio recever works on. this type of system would over come some difficulties with anti scanning tones witch are a bunch of static broadcast on trunked(systems that use one radio that switches between frequencyes every broadcast) systems that keep you from scanning through the channels automaticaly (although there are now scanners that can track these services) this type or recever even if made very carfully ould only have a range less than maybe 25 yards.

[nbk2000]

I've thought about using RFID tags to mark police vehicles for the purpose of detecting an approaching piggie. It wouldn't detect the individual pig, but the car he (almost) never leaves. If you can detect the cop car, you've detected the cop.

Tagging would only work if you could get the majority of vehicles in the police fleet. This is feasible in a small town that only has a dozen or so cop cars, but LA or NY...forget it.

It may also be possible to passively detect a police car. Most US cop cars are crown victorias. If you can detect a signal that is unique to crown vics, then you could detect them. Perhaps an RF signal genereated by the ignition system or such. Just such a system was used by USAF spectre gunships to detect VC truck convoys in vietnam.

Cop cars also have light bars that generate a certain pattern of light pulses that could be monitored by a photo-optic circuit. These lights are unique to each service (police, sheriff, highway and state patrol, fire, ambulance, etc). This works only if they're using their lights, but they use lights much more often than siren to clear the way.

Maybe some form of AI detection to visually detect, via cameras, the unique coloration schemes of a police vehicle and sound warning of their approach.

Naturally, none of these will detect the undercovers, off-duty, detectives, or SWAT (most likely). But every bit helps, eh? <img border="0" title="" alt="[Wink]" src="wink.gif" />

Your detector needs to be far enough away to allow you sufficent time to react to the warning, and cover the most likely (if not all) routes of piggie approach.

[PYRO500]

In fact you cna detect the strobes that are in light bars, they work off an inverter sicruit and make a similar wine on sensitive radios that can receve am/ssb. you could also set a camera withb special software to recognize not just bright pules of light but sequential pulses of light. as for the ignition detection I think that may be kind of hard to diferentiate as almost all cars have noise that comes from the alternator/fuel pump and ignition system. very few of them are diffrent from eachother except a few crappy cars that their fuel pumps make more noise on the radio than usual. I think it would be awsome if they started installing onstar like systems in the cars and you could obtain pirate hacked hardware that allows you to receive what they are supposed to receive, in effect using their own system against them. The best bet now is to tag the cars. since the vehicles undergo regular inspection all someone would need to do is have a mechanic on the inside that could plant the low power radio transmitter somewhere say inside a tail light bulb. such a device would be able to be powered almost indefinitely off of the car's battery with no drain on the battery when not inuse and also not showing up amongst the other vehicles that are active. It is also possible that you could even detect the proximity with fair accuracy with a simple signal strength meter

[3rd Strike]

thanks for the ideas guys thoes are helpful...the GPS onstar type tracking would kick ass... i should give the force the idea for installing it around here just for the purpose it would be easier to track them...you could have alot of fun with that kinda stuff... youd be an invisible enemy, everytime they showed up youd be gone

[endotherm]

If you live in a relatively small town, just check the frequencies they use, i was able to get a list of frequencies and the ten-codes of my local police department, down to the precints! I can just listen on my scanner to the frequncy of the precint that has control over my district, and if i ever hear them say they are coming to where I am, i can just get the fuck out of there. It actually works and i have used this before after committing vandalism and after setting off big charges, i know their gonna be here, before they do! For the last couple of big charges i set off, i always listen to the scanner right afterwards, noone called the cops though, but if they did i would've known. But it works, anytime a officer is going anywhere in my district, it is said over the same frequency.

[PYRO500]

the only problem is with scanners they often have trunked radio systems with anti scanning tones making it almost impossible to get the whole message. Also many police/law enforcement orginizations have several possible systems that they may use along with special forces and poliece that ride bikes/walk the streets they may use an entirely diffrent radio system and often the police have tactical channels that they use when going for a bust or operation that is possibly digitaly scrambled or encrypted to avoid scanner use. i have also seen cops around here using cell phones that they have donated to the department, and they aren't the easy to listen analog ones either.

[Fl4PP4W0k]

Well, Voice radio is only one method of communication used by police.

The preferred method is in-car data. Wether it be a system that uses the MDT4800, RDLAP192 or some older style POCSAG or FLEX data protocol - these can ALL be collected and deciphered with the use of appropriate equipment.

Information that is sensitive usually is NOT passed over voice, even 800mhz trunked networks. I have a few radio-data setups going, and the amount of shit thats crammed over the airwaves is ASTOUNDING!!!
Credit card numbers, social security and a plethora of other juicy tidbits.

The cops in australia Voice channels operate on the UHF465 band, using CTCSS encoding. This is just a technique to prevent un-authorised communication... but it doesnt work to well :D
Im sure, If someone had the appropriate equipment *cough* then interception and retransmission of signals could be acheived.

Anways, back to the topic.
Many of the newer MDT systems incorporated into vehicles such as squad cars, ambulance and fire include a position indicator of some sort. This is to assist dispatch in determining which units are in range of a certain job, ofcourse.
As this signal is transmitted UNENCRYPTED back to dispatch, It would not be OVERLY hard to compile a peice of code that detected cops in your vicinity.
A program could latch onto MDT Decoding software, interface with your handheld GPS and determine the nearest pig in your area. This could, with time, be constructed into a City Map GUI and have a pretty picture with little dots flying all over the place :)

Although, this isnt going to be happening any time soon - and by the time someone writes such an application the cops would have wisened up and used SOME type of encryption.

If anyone is interested in data decoding off the airwaves, give us a yelp.

Catchyas,
rob

[pyromaniac_guy]

I thought onstar only transmits your position when you call into the call center, not on a continuous basis...

[Fl4PP4W0k]

"Cop cars also have light bars that generate a certain pattern of light pulses that could be monitored by a photo-optic circuit"

Oh yeah... about that pulsed light signal - is that not for changing traffic lights or something?
If so, the range would be CRAP!! Id say about 25m line of sight at most... and if a cop can see you at 25m clear view - ur pretty much fucked. They can atleast get a decent ID.

Also, in monitoring the spurious emmisions of the IF in the radios, the range would be REALLY limited. And, due to the low power of these signals, in the city (I presume many of you - who are worried about cops - live in one <img border="0" title="" alt="[Wink]" src="wink.gif" /> ) all the pager\cell-phone intermod would reak havoc.

Oh, Most of the (halfway) decent UHF HTs ive seen are Triple Conversion... Most double conversions are VHF, Old WideBand scanners and Amateur gear.

[Fl4PP4W0k]

Have you ever monitored an MDT ?
These things report in like every minute or so.

(of course it depends on the setup)

[AfterRain]

If anyone remembers i had a post such as this on the old forum, But it was a graphic display of the cops , it would use a gps reciver , to get the squad cars gps transmission, and then you would enter in your gps x,y .. and then it would show where each cops is how close/far from you. dont know if anyone remembers this.. but yea... maybe something more along the lines of this would be better to get a whole lil map of cars, so you know where to run to and what not...
----- well dependin' on what ya used it for, a car based unit might have better reciveing due to the fact you could use way better antenna, but if i was to use these i think i would have the handheld due to me a) no car b) way to easy to run from pigs around here

<small>[ June 27, 2002, 09:02 PM: Message edited by: AfterRain ]</small>

[J]

Fl4PP4W0k, what sort of equipment would a person use to monitor the in car data systems? I presume a scanner with a connection direct to the discriminator, and then connect this to a soundcard and use some software to decode the data?

[PYRO500]

I like the idea of using a doppler shift antenna system that uses 5 antennas on you car to determine the distance and direction a signal is from you.

[Fl4PP4W0k]

"But it was a graphic display of the cops , it would use a gps reciver , to get the squad cars gps transmission, and then you would enter in your gps x,y"

Uhm... Use a GPS reciever to get the cars GPS transmission :rolleyes:

Err.. the systems ive seen do NOT transmit to satellite. That would be the teeniest bit pricey, and technically complicated.

And anyway.... to be able to INTERCEPT! a satellite bound signal? Riiiite...
The systems that ive seen\read about, use a relay kind of thing. nice 'n cheap. Theres a standard GPS reciever, serial interface with MDT. Sends a lat\long co ord. to dispatch. Dispatch's computer places this signal on the big 'ol map... and everyones happy.

To monitor these signals, either using a discriminator tap\soundcard method or serial interface works... but serial is the most accurate. Im not aware of a decent RDLAP19.2 decoder, but Ive got some MDT4800 programs that work well.
For soundcard, MDTMON is my choice. For serial interface (4 level FSK) id choose MDTW1234 (this runs on my 486 :D )

A method of testing the distance... hmmm.
Well, all squad cars use standard fixed power transmiters. A directional YAGI or mebbe a parabolic would be up to the task.... when coupled with a sensitive signal meter.

This would have the disadvantage of being affected greatly by reflection, obstruction and interference :(

I still like the MDT\GUI idea...

EDIT: POSTED HALF WAY THRU :mad:
edit: i dont type well when wasted :)

<small>[ June 28, 2002, 08:18 AM: Message edited by: Fl4PP4W0k ]</small>

[nbk2000]

I've read that there are detectors above the traffic lights of major intersections that will turn the lights green for fire/ambulance/police when they detect the specific light pulse pattern of their lightbars.

Now, the detector for this may only have less than 50 yards range, but if your detector has a transmitter range of a mile or more, than you simply put the detector a mile down the road and it'll detect the passing of any piggy cars at least one minute in advance of their arriving on your scene.

Even better would be to connect your detector to some device that'll delay/prevent them from reaching you while giving you warning. Perhaps a small projector that'll launch a spike strip across the road or scatter hundreds of caltrops. This delays them, buying you time to escape before they're anywhere near the scene.

And you don't need to be able to understand anything being transmitted by the pigs MDTs or radio, just simply know of their presence and approximate distance. Direction would be nice too, but not as important as presence.

Also, having an antenna farm on top of your car would draw attention too. A trick used by the people who tracked down Kevin Mitnick was to hide the dipole antennas inside of fluorescent light bulb boxes on a rack on top of a van so it just looks like maintainence supplies.

Perhaps one of those plastic shells used for carrying luggage on top of a car would be useful as a disguise for the antenna/s.

[Fl4PP4W0k]

Or a plumbing van... chunks of 'o so useful PVC obscuring antennas.

What if the cops only used the little strobe setup when there was a red light :confused: , then it would be a little tricky.

And do all countries cops do this? Im sure they would, but any info?

Also, whats the point in shredding the shit thru some pigs tires, if their not headed towards you?
If they just passing by, and their tyres fly off the car - they might be thinkin sumfin fishy's going on...
Ofcourse, a fucked over squad cars a good one - but needlessly allerting to ur presence? If they WERE following a report,or heading straight towards you\getaway route - THEN shredded tyres would be on the agenda.

If you truly want a pig-free job... then you need planning.
Choose a place thats difficult to find by road... or block off obvious road access (leave your own route :D )
Do a little test.... report a similar crime in that area 911 or whatever, then listen in on your scanner. Find out how long it takes the pigs.
Do this a few times in various areas.... to get an idea of response times. Then you know wot u gotta work with.

Currently, I am building a 465MHz directional antenna for police data work... Its a VERY fucking simple design, If anyones interested. (an 800MHz one is on the horizon)

l8r,
rob

[nbk2000]

As far as I know, the moment the cops turn on their lights, the red light thing is activated, always.

[Fl4PP4W0k]

Ohk...
In that case, If the cops were trying to be subtle *cough*, then the optic-detector method wouldnt be appropriate. On the otherhand, it would prevent the...arousal...of cops that werent on ur tail.

IDEA!!!
I say someone goes and steals a traffic light :D
If theres a sensor there, harvest the little bastard and use the light as a funky lamp fer ur room.

Find out what exactly it detects... and enhance the sensetivity -lenses etc..- to make it usefull for this application.

l8r,
rob

[AfterRain]

yoOo why is it you would just would like to detect lights? i understand why, but its useless if there lights are not on... So why not just got with any of the cars id/gps signal if any..thats what im tryin' to do, is use the cops gps, to be displayed on an lcd screen.. yoOo rob, im intrested in data-decoding airwaves... hit me up at rob600s180@aol.com if ya dont mind . thanks...
yo,Fl4PP4W0k , where can i find more information about DDI? thanks man

<small>[ July 01, 2002, 03:23 PM: Message edited by: AfterRain ]</small>

[panthatar]

just a thought but i was reading some material a way back about licence plate identification used bye companys for security boom gates u could apply this bye making ya own basic system that digitizes the pic then ignors the back round except for the number plate from this the data could be turned into a database enetry and after few weeks to a couple of months u would have all the cop cars in ya area profiles even the un marked ones and even add ones of suspicious nature that are always around the cop station then for the early warning detection side of things u just need a camera set up in the main car access points to the area u r in and set them so i get good warning the system would search the database then if its a pig boom u got him and u r warned bye a pager or sms even a pre recorded message that rings ya mobil phone number the good part about this system is that it could be done for less then 10,000$ and would be one hell of a tool to seel to crims and u could market it legitimatly as a security system for buisnesses so it would be legal but like every thing it has a second use

[john_smith]

I wonder if the abovementioned plate identification devices could handle a car blasting through at 60+ mph.

[UmInAsHoE]

how would someone go about recieving MDT signals, and decoding them? i.e what equipment, i would like to try this out in my area.

[UmInAsHoE]

how would someone go about recieving MDT signals, and decoding them? i.e what equipment, i would like to try this out in my area.

[UmInAsHoE]

how would someone go about recieving MDT signals, and decoding them? i.e what equipment, i would like to try this out in my area.

[john_smith]

How abot a modified Radar Detector Detector (RDD)? AFAIK these devices work by sending out a high-powered signal pulse on the radar frequency that the radar detectors are built for, and then detect the "echo" from the RD's tuned circuit. I've also heard of similar devices being used in countries like Germany that have "TV and Radio Tax" to detect tax evaders, so probably it'd be possible to build one for police radio frequencies...

[john_smith]

How abot a modified Radar Detector Detector (RDD)? AFAIK these devices work by sending out a high-powered signal pulse on the radar frequency that the radar detectors are built for, and then detect the "echo" from the RD's tuned circuit. I've also heard of similar devices being used in countries like Germany that have "TV and Radio Tax" to detect tax evaders, so probably it'd be possible to build one for police radio frequencies...

[john_smith]

How abot a modified Radar Detector Detector (RDD)? AFAIK these devices work by sending out a high-powered signal pulse on the radar frequency that the radar detectors are built for, and then detect the "echo" from the RD's tuned circuit. I've also heard of similar devices being used in countries like Germany that have "TV and Radio Tax" to detect tax evaders, so probably it'd be possible to build one for police radio frequencies...

[Jacks Complete]

Agreed. A "cop detector" would be fun. If you lived down a single access road, either out in the country or in one of the fucking silly town-planner-designed ghetto estates with a single entry/exit for over two hundred houses, you could set it up at the farthest point. When it rings you telling that it just read the word "POLICE" on a car coming down the road, you are at least aware.

Mounting one on your rear dash might be good, in case you miss the guy charging up behind you to check your speed. Any car with flashing lights should trip it, too.

Store the photo with the plate details, timestamp, number of occupants, etc. too. Work up the MO!

Thinking of which - the detectors on traffic lights are very, very crude. They just detect ANY flash. Try it. Drive towards one at night, flash your mainbeam lights rapidly, it will change. I do it sometimes. The ones on main roads near fire stations, etc. are most likely to have them, in my experiance.

[Jacks Complete]

Agreed. A "cop detector" would be fun. If you lived down a single access road, either out in the country or in one of the fucking silly town-planner-designed ghetto estates with a single entry/exit for over two hundred houses, you could set it up at the farthest point. When it rings you telling that it just read the word "POLICE" on a car coming down the road, you are at least aware.

Mounting one on your rear dash might be good, in case you miss the guy charging up behind you to check your speed. Any car with flashing lights should trip it, too.

Store the photo with the plate details, timestamp, number of occupants, etc. too. Work up the MO!

Thinking of which - the detectors on traffic lights are very, very crude. They just detect ANY flash. Try it. Drive towards one at night, flash your mainbeam lights rapidly, it will change. I do it sometimes. The ones on main roads near fire stations, etc. are most likely to have them, in my experiance.

[Jacks Complete]

Agreed. A "cop detector" would be fun. If you lived down a single access road, either out in the country or in one of the fucking silly town-planner-designed ghetto estates with a single entry/exit for over two hundred houses, you could set it up at the farthest point. When it rings you telling that it just read the word "POLICE" on a car coming down the road, you are at least aware.

Mounting one on your rear dash might be good, in case you miss the guy charging up behind you to check your speed. Any car with flashing lights should trip it, too.

Store the photo with the plate details, timestamp, number of occupants, etc. too. Work up the MO!

Thinking of which - the detectors on traffic lights are very, very crude. They just detect ANY flash. Try it. Drive towards one at night, flash your mainbeam lights rapidly, it will change. I do it sometimes. The ones on main roads near fire stations, etc. are most likely to have them, in my experiance.

[DimmuJesus]

As I understand it, here in the US the penalty for flashing your lights to change traffic lights is pretty hefty.
I believe that now most of them detect some sort of invisible pulsating IR or such. This being changed of course to avoid people flashing their lights at traffic sensors, and with all the other lights in Cities they tend to be triggered accidentally. They sell the devices that police use, even recommending places to hide the device (such as in the glass of fog lights on cars that have them with no bulbs installed), with an on/off switch mounted inside the car. I will look for the link and if someone else doesn't beat me too it will post it back here.

[DimmuJesus]

As I understand it, here in the US the penalty for flashing your lights to change traffic lights is pretty hefty.
I believe that now most of them detect some sort of invisible pulsating IR or such. This being changed of course to avoid people flashing their lights at traffic sensors, and with all the other lights in Cities they tend to be triggered accidentally. They sell the devices that police use, even recommending places to hide the device (such as in the glass of fog lights on cars that have them with no bulbs installed), with an on/off switch mounted inside the car. I will look for the link and if someone else doesn't beat me too it will post it back here.

[DimmuJesus]

As I understand it, here in the US the penalty for flashing your lights to change traffic lights is pretty hefty.
I believe that now most of them detect some sort of invisible pulsating IR or such. This being changed of course to avoid people flashing their lights at traffic sensors, and with all the other lights in Cities they tend to be triggered accidentally. They sell the devices that police use, even recommending places to hide the device (such as in the glass of fog lights on cars that have them with no bulbs installed), with an on/off switch mounted inside the car. I will look for the link and if someone else doesn't beat me too it will post it back here.

[Jacks Complete]

You've got to be shitting me! You can get <i>fined</i> for flashing your lights?

Anyway, I think the OCR method is the best. I was trying to get someone to actually develop it, but he had an attack of the morals on it... I can't think why!

A little system for picking up the lights on planes and helicopters might be useful, too, as you would soon know if the police helicopter or spotter plane was flying towards you from the anti-collision strobe and the navigation lights. Then you have to get "shot" of it, but that's a different issue.

[Jacks Complete]

You've got to be shitting me! You can get <i>fined</i> for flashing your lights?

Anyway, I think the OCR method is the best. I was trying to get someone to actually develop it, but he had an attack of the morals on it... I can't think why!

A little system for picking up the lights on planes and helicopters might be useful, too, as you would soon know if the police helicopter or spotter plane was flying towards you from the anti-collision strobe and the navigation lights. Then you have to get "shot" of it, but that's a different issue.

[Jacks Complete]

You've got to be shitting me! You can get <i>fined</i> for flashing your lights?

Anyway, I think the OCR method is the best. I was trying to get someone to actually develop it, but he had an attack of the morals on it... I can't think why!

A little system for picking up the lights on planes and helicopters might be useful, too, as you would soon know if the police helicopter or spotter plane was flying towards you from the anti-collision strobe and the navigation lights. Then you have to get "shot" of it, but that's a different issue.

[xyz]

DimmuJesus, If they can be hidden behind foglight glass then they aren't IR.

IR doesn't pass through glass, which is why IR devices have plastic lenses.

[xyz]

DimmuJesus, If they can be hidden behind foglight glass then they aren't IR.

IR doesn't pass through glass, which is why IR devices have plastic lenses.

[xyz]

DimmuJesus, If they can be hidden behind foglight glass then they aren't IR.

IR doesn't pass through glass, which is why IR devices have plastic lenses.

[john_smith]

Lots of cheap aftermarket foglights with shitty plastic lenses out there... Btw does anybody have some info/links about the RDD type devices used to find those malicious "TV tax evaders"? I've searched but haven't found anything good yet. A good thing about such a device would be that it could be used for checking suspected unmarked/undercover pig vehicles as well.

[john_smith]

Lots of cheap aftermarket foglights with shitty plastic lenses out there... Btw does anybody have some info/links about the RDD type devices used to find those malicious "TV tax evaders"? I've searched but haven't found anything good yet. A good thing about such a device would be that it could be used for checking suspected unmarked/undercover pig vehicles as well.

[john_smith]

Lots of cheap aftermarket foglights with shitty plastic lenses out there... Btw does anybody have some info/links about the RDD type devices used to find those malicious "TV tax evaders"? I've searched but haven't found anything good yet. A good thing about such a device would be that it could be used for checking suspected unmarked/undercover pig vehicles as well.

[Jacks Complete]

You can get scanners that will do it. Just get a high gain aerial, and hook it up to one fo the fancy ones with an LCD screen, and you can see what people are watching.

You can also do it for monitors. Yes, this has been used for espionage!

[Jacks Complete]

You can get scanners that will do it. Just get a high gain aerial, and hook it up to one fo the fancy ones with an LCD screen, and you can see what people are watching.

You can also do it for monitors. Yes, this has been used for espionage!

[Jacks Complete]

You can get scanners that will do it. Just get a high gain aerial, and hook it up to one fo the fancy ones with an LCD screen, and you can see what people are watching.

You can also do it for monitors. Yes, this has been used for espionage!

[Arthis]

Just about the device that turns lights green, they don't have it in france. They just go thru and people are to stop and let them a path. And I'm quite sure it's the same in some countries around, Spain, Italy, Belgium & Germany.

[Arthis]

Just about the device that turns lights green, they don't have it in france. They just go thru and people are to stop and let them a path. And I'm quite sure it's the same in some countries around, Spain, Italy, Belgium & Germany.

[Arthis]

Just about the device that turns lights green, they don't have it in france. They just go thru and people are to stop and let them a path. And I'm quite sure it's the same in some countries around, Spain, Italy, Belgium & Germany.

[Jacks Complete]

Arthis, yes, same here, but there is a device that detects the lights. It lets them go faster, since the lights will be on green for them, and they can just thrash through at speeds they mandate as being unsafe for you, rather than have to drop below the limit to cross the traffic flow.

IF I lived out in the middle of nowhere, I sure would have a polis detector - in fact, any car with a number plate not on the list would get flagged up!

[Jacks Complete]

Arthis, yes, same here, but there is a device that detects the lights. It lets them go faster, since the lights will be on green for them, and they can just thrash through at speeds they mandate as being unsafe for you, rather than have to drop below the limit to cross the traffic flow.

IF I lived out in the middle of nowhere, I sure would have a polis detector - in fact, any car with a number plate not on the list would get flagged up!

[Jacks Complete]

Arthis, yes, same here, but there is a device that detects the lights. It lets them go faster, since the lights will be on green for them, and they can just thrash through at speeds they mandate as being unsafe for you, rather than have to drop below the limit to cross the traffic flow.

IF I lived out in the middle of nowhere, I sure would have a polis detector - in fact, any car with a number plate not on the list would get flagged up!

[Bugger]

Here in New Zealand, motorists also flash their headlights to warn other oncoming motorists of mobile Police speed detector sites which they have just passed. However, it is perfectly legal, to the chagrin of the Pigs.

[Bugger]

Here in New Zealand, motorists also flash their headlights to warn other oncoming motorists of mobile Police speed detector sites which they have just passed. However, it is perfectly legal, to the chagrin of the Pigs.

[Bugger]

Here in New Zealand, motorists also flash their headlights to warn other oncoming motorists of mobile Police speed detector sites which they have just passed. However, it is perfectly legal, to the chagrin of the Pigs.

[Jacks Complete]

They outlawed that here, in a rather cunning way. Using one of the many, many loosely defined laws on the books, they actually arrested and charged a man for doing just that, for "perverting the course of justice"! How sick is that? The fuckers made it stick, too...

Like being done for "conspiracy" and nothing else, with persons unknown... :mad:

[Jacks Complete]

They outlawed that here, in a rather cunning way. Using one of the many, many loosely defined laws on the books, they actually arrested and charged a man for doing just that, for "perverting the course of justice"! How sick is that? The fuckers made it stick, too...

Like being done for "conspiracy" and nothing else, with persons unknown... :mad:

[Jacks Complete]

They outlawed that here, in a rather cunning way. Using one of the many, many loosely defined laws on the books, they actually arrested and charged a man for doing just that, for "perverting the course of justice"! How sick is that? The fuckers made it stick, too...

Like being done for "conspiracy" and nothing else, with persons unknown... :mad:

[Silentnite]

Here, we delight in seeing someone else getting pulled over, as it means that we are free to go faster with the pig tied up for 20-30 minutes doing paperwork. But sometimes we delight even more in ruining a pigs profit margin, so we will either tap the brakes(should we see one ahead) or flash if we just came from a speed trap. We also post sightings on the radio, so cops don't really get to sting.

Its a fun game of beat-the-laser around here.

[Silentnite]

Here, we delight in seeing someone else getting pulled over, as it means that we are free to go faster with the pig tied up for 20-30 minutes doing paperwork. But sometimes we delight even more in ruining a pigs profit margin, so we will either tap the brakes(should we see one ahead) or flash if we just came from a speed trap. We also post sightings on the radio, so cops don't really get to sting.

Its a fun game of beat-the-laser around here.

[Silentnite]

Here, we delight in seeing someone else getting pulled over, as it means that we are free to go faster with the pig tied up for 20-30 minutes doing paperwork. But sometimes we delight even more in ruining a pigs profit margin, so we will either tap the brakes(should we see one ahead) or flash if we just came from a speed trap. We also post sightings on the radio, so cops don't really get to sting.

Its a fun game of beat-the-laser around here.

[cyclonite4]

Here in New Zealand, motorists also flash their headlights to warn other oncoming motorists of mobile Police speed detector sites which they have just passed. However, it is perfectly legal, to the chagrin of the Pigs.

The same thing is done here in Australia, and while it's legal, it is looked down upon by pigs and 'boy-scouts'* alike.

*By 'boy-scouts', I mean goodie-two-shoes with nothing better to do than tell the pigs about what others are doing.

[cyclonite4]

Here in New Zealand, motorists also flash their headlights to warn other oncoming motorists of mobile Police speed detector sites which they have just passed. However, it is perfectly legal, to the chagrin of the Pigs.

The same thing is done here in Australia, and while it's legal, it is looked down upon by pigs and 'boy-scouts'* alike.

*By 'boy-scouts', I mean goodie-two-shoes with nothing better to do than tell the pigs about what others are doing.

[cyclonite4]

Here in New Zealand, motorists also flash their headlights to warn other oncoming motorists of mobile Police speed detector sites which they have just passed. However, it is perfectly legal, to the chagrin of the Pigs.

The same thing is done here in Australia, and while it's legal, it is looked down upon by pigs and 'boy-scouts'* alike.

*By 'boy-scouts', I mean goodie-two-shoes with nothing better to do than tell the pigs about what others are doing.

[Skean Dhu]

Unfortunately not all US cities have the emergency vehicle detector on their traffic signals, I know mine does not. Although I am 90% sure all emergency vehicles are equipped with said infrared signal.

Here flashing your lights to alert passing motorists to a speed trap or checkpoint of some form or another is prosecuted as an obstruction of justice case.assuming you're caught.

[Skean Dhu]

Unfortunately not all US cities have the emergency vehicle detector on their traffic signals, I know mine does not. Although I am 90% sure all emergency vehicles are equipped with said infrared signal.

Here flashing your lights to alert passing motorists to a speed trap or checkpoint of some form or another is prosecuted as an obstruction of justice case.assuming you're caught.

[Skean Dhu]

Unfortunately not all US cities have the emergency vehicle detector on their traffic signals, I know mine does not. Although I am 90% sure all emergency vehicles are equipped with said infrared signal.

Here flashing your lights to alert passing motorists to a speed trap or checkpoint of some form or another is prosecuted as an obstruction of justice case.assuming you're caught.

[ke6ziu]

anyone have any ideas of something you could use to detect police much like a fuzz buster...for putting in your pocket when walking around..maybe let it scan for police chatter on their frequency within reasonable range or something like that....any ideas would be helpful

I use a dual band vhf/uhf set to CHP when I'm on the freeway. Whenever you monitor their mobile extender, you'll hear a chirp. That usually means that they're out of the vehicle. If you look at the S Meter, you can get an idea of how far away they are from you. If the meter is full scale, keep your eyes open. If the meter is only showing s-1, don't worry; but keep your eyes open nonetheless...

[UmInAsHoE]

I been looking around for some time about MDT and police cars and found that in UK there are quite a few boroughs that use it:

http://www.mobiletrackingsystems.com/customer.htm

also I found a handy text file written for people who want to crack and track the signals:

This program only works for systems built by Motorola using the MDC4800 tranmission protocol

http://rapidshare.de/files/21019609/mot-mdt.txt.html

++++

Is there a particular reason for using the CODE tages like this? Our links are routed through an anonymizer, so the IP's aren't tracked back to originating from the Forum.

NBK

[JakeGallows]

The device that has been repeatedly mentioned on this thread (though some years ago) is known as a Mobile Infrared Transmitter (MIRT). Essentially it just sends out (sometimes coded) flashes of light that are read by a detector above streetlights

More information can be found here:

www.themirt.com
www.skyoptics.com/Mirt.htm
www.southernrescue.org/MIRT/MIRT_faq.htm

An image of the MIRT detector mounted above streetlights can be seen as the pointy thing above the streetlight here: http://www.mycrazyhobby.com/images/home/light.jpg

[matix]

Hi.

I have a schematic for scanning mobile phones and as this detects the signal pulses you can modify the signal frequency to scan for piggies and, if combined with a pocket pc, you could calculate the range and direction and display their location on a map.

http://www.elektor-electronics.co.uk/Default.aspx?tabid=28&mid=405&ctl=Buy&buy=e025064.pdf&emid=403&art=50661

That link will take you to the place I got the schematics from. For detection you dont need to decrypt the carrier because you want to just detect the presence of piggy frequencies.

++++++

Corrected all the atrocious grammar and spelling errors. NBK