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Traffic Light Control For The Masses
uniformed1 writes "Eliminating red lights along the routes of their vehicles can give
emergency response teams the few extra critical minutes that can save
lives and property. A front page article
in today's Detroit News details
the emerging problem with a device that is now being made available to
the public -- a traffic light changer. Originally intended only
for emergency vehicles, the $300 MIRT (mobile infrared transmitter)
emits an infrared beam that signals traffic signals to turn green and
gives the vehicle the right-of-way. It is only a matter of time
before self-centered drivers start using the devices widely to skirt
traffic congestion, which is creating fears that chaos will
ensue." Maybe if everyone had these, it would lead to smarter intersections.
What idiots make these things???
Oh well, what the hell...
www.themirt.com has a lot of info on these devices. Even a dealer list of where to get one. Man, I'm tempted...
-mikey
One thing to do, then, would be to change the behavior of the traffic lights so that on receiving this signal, they go to four-way red. Since emergency vehicles can run red lights, it doesn't stop them, while simultaneously deterring civilians from using them.
(The trouble is the lack of feedback. You'd need some kind of indication that the other ways had gone to red before the ambulance driver will have confidence going through the intersection at full speed)
IR guided Maverick anti tank missiles mounted on traffic light poles. Bet those suckers shut off their IR transmitter then!
Beep beep.
Professor Frink: "We studied traffic patterns and found that drivers move the fastest through yellow lights, so now we just have the red and yellow lights, mm-haiai."
Lenny [flooring it]: "Stay yellow! Stay yellow!"
The only time an ambulance driver goes full-speed through an intersection with the siren screaming and cars breaking left and right is in the movies. In real life, they slow down and approach the intersection with all the care appropriate to one who's about to violate the traffic pattern. Because, after all, it doesn't help the dying guy in the back if the ambulance gets in an accident on the way to the ER.
I think the idea was that mass dueling transmitters might be smarter than weight sensors or cameras. I see this, however, as a perfect case study for the Tragedy of the Commons.
All's true that is mistrusted
1. There's an awfull lot of cameras at intersections these days. (and not just red light still cameras either, where I am there's a few vid cams at every major intersection).
2. IR shows up on B&W CCD cameras.
1+2 = just have someone watch vids for cars that have bright IR pulses coming from the dash.
3 ????
4. Profit
--I don't want the world, I just want your half.
Why are these devices not illegal? Seems to me that the intersection should take a picture of the vehicle using the device... if there aren't flashing lights, send a ticket in the mail.
The only problem there is how do you know which driver among the 20 approaching the intersection has the device? Sure, if you see someone with their arm out the window pointing a remote at the traffic light it's a no-brainer, but an IR transmitter peeking out of the front grill or behind some trinket on the dash would be impossible to make out.
Just make it some enourmous fine... $25000 per offense or some such figure when the device is used for a non-emergency purpose. That way, the devices themselves aren't illegal (though I agree that they probably should be) but the uses are. You could, conceivably, drive your wife to the hospital when she's about to give birth, but you couldn't use it just because you're late for work.
Want to improve your Karma? Instead of "Post Anonymously", try the "Post Humously" option.
There are sensors on the top of traffic lights in the UK that respond to headlights.
If an ambulance is approaching lights on red he can flash his full beams a few times and the sequence changes.
I use this feature all the time at the lights near my house, especially late at night when the deafult sequence on the lights is to stay green for the main road all the time unless a car approaches on the minor road.
your average CCD will detect IR. Don't believe me? Pull out your camcorder and aim a remote at the camcorder. It looks like white light. I know where I live, we have CCD DOT cams at almost every intersection. It would be easy to pick out the car emitting the bright flashes.
I guess the slashdot editors editors weren't too into the hacking/phreaking scene back in the day. This was documented some 10 years ago.
If you want proof, consult the google time machine. Scroll down or search for "Chrome Box".
Here is some more information with pictures of the Optocom sensors (mounted to the signals) and of EMS and Fire transmission units.
I assume the old ones where nothing more than an infared flashlight, and the "upgraded" ones use some sort of modulation something like a TV remote. The picture in the article shows what looks like a 3rd brake light with a lighter plug. It probably costs $20. They're basically charging $300-$500 for a long range TV remote control
It might be easier to change the light by getting out and pressing the walk button on the sidewalk.
Here is a photo of the sensor
Although I lived almost three years in Northern California and disliked the place as a whole, the one thing that did stand out is the outstanding traffic control system with optical and pavement vehicle sensors. The volume of traffic notwithstanding, it was the fairest traffic systems I've ever seen.
For example, if there are left turn lanes on opposing lanes at an intersection, and one of those lanes is empty but the other is full, when the lights turn green the left turn lane for the empty lane stays red and simultaneously turn the signal green for opposing straight-through traffic. Not only that, but the left turn signal would only stay green until the last car had cleared or until a maximum time interval elapsed, at which point it would turn red again and allow opposing straight-through traffic to flow. In fact, if there was no waiting straight-through traffic in the one direction, some lights would just stay green for the lanes that had it until a car attempting to cross the intersection would trigger a timer.
Contrast this with, say, Edmonton, Alberta's dreadful traffic system, where nearly everything is on straight timers save for buses with road sensors and emergency vehicles, and there are no timing lights for freeway on-ramps. There are some sensors at some intersections, but by and large nearly everything is timed and it creates frustration and accidents. It's doubly ironic considering that Edmonton has the highest density of traffic lights in North America and traffic circles on major roadways!
In other words, if you design your traffic system the right way the first time, devices like this become unnecessary. An economist once commented that traffic lights are a nearly perfect unbiased system for resolving conflict. Why create bias in favor of certain selfish individuals? It doesn't work in economies, and it doesn't work on roadways.
We're going to hear a lot of people calling to make these devices illegal- except in the hands of qualified emergency response personnel. We must resist them. Traffic light control is yet another prime target for deregulation and privatization, and keeping these wonderful devices out of the hands of ordinary citizens restricts our liberty to control intersections that we've paid for with our tax dollars.
Competition and free markets make everything better. They work great for companies, which is a strong indicator that they improve everything else, too- like public schools, the electrical power grid, and traffic lights at intersections. Why should emergency response vehicles receive a government-granted monopoly on the control of traffic lights? This is just old-fashioned, socialist thinking. If I want to turn my light green and yours red, and I'm willing to pay money for the privilege, why shouldn't I get the right of way? I've got more discretionary income, which means my time is probably more important than yours anyway. Government should not be standing on our necks and telling us who can and can't control traffic lights. The "invisible hand" can do a better job of guiding traffic through intersections anyway!
I can hear the socialists whining even now. "But what about the poor ambulance and police cars?" they'll say. They're so addicted to government regulation they don't realize how wonderful things would be if it were every man for himself. Hey, why should the government have a monopoly on ambulance service and law enforcement? My Expedition has plenty of room in the back for a heart attack victim or a criminal. If I'm willing to pay the money I should be able to offer a competing emergency response service as I sail through an endless sea of green lights and yap on my cellphone. To argue otherwise is socialist, and we've learned from the fall of the Soviet Union that socialism doesn't work, people.
OK, so it's a cheap shot at you guys. I can't resist- it's so much fun, and you make it so easy!
Here are some of the vehicle traffic laws as they pertain to emergency vehicles here in New York State, other states are mostly similar.
Only police department vehicles are allowed to proceed through red lights without stoping.
EMS and Fire trucks have to make a full stop at every red light while going lights and sirens to a job, regardless of the priority.
In reality, I slow down significantly and roll through at a cool 3-5mph.
Lights and sirens for EMS and fire are a courtsesy. The guy in front of you is in now way obligated to blow a red light for you if he feels it's unsafe for him to proceed. Oh, and btw, if a medic or emt gets on the P.A. and tells you to cross a red light, and you get into and accident, the medic is at fault for the acccident.
Going down one way streets and driving on the opposite side of the road are allowed, with the understanding that you do so at reduced speed and with extreme caution, any accident in this situation is all on your shoulders.
Here in Manhattan, slow and steady is the best way. You can't justify injuring bystanders for someone who is already sick.
And with critical patients in the back, you'll drive even slower to the hospital 'cause there's alot of things that we need to that can't be done if you're bouncing around the back cab like a virgin's first visit to some Panamanian wha wha rumphouse.
These device have been mentioned here in the city, and it was agreed that it would cuase more confusion and possibly more liability for the city than it's worth.
--
1. Do what the military does, strobe the lights in a morse code fashion. Assign a seperate code to each city vehicle that needs to use the system. Any vehicle not strobing a proper code gets no joy.
2. retrofit traffic light camera's to snap pictures of the traffic when the system is activated. Remove the infrared filter from the camera and the camera will easily and plainly show the vehicle that is attempting to open the intersection. You get a picture of the perp and his license plate, plus the light will be plainly visible to the camera. Perfect evidence for a court case.
If the system is coded and someone attempts to copy the codes then they can prosecute them for hacking into a governemnt computer system.
After all, the traffic lights are computer controlled, they should not be accessible to the public and if you hacked the system via the Internet it would be your nuts on the chopping block.
That's how I've heard this system operates (at least in Seattle)...strobe light gives "all-stop" at the signal. From where I heard this, it was done deliberately to avoid this type of stunt with the strobe light on civilian vehicles. This is also the safest option too, as emergency vehicles are trained to run red lights (after slowing and checking) and go around stopped vehicles. "All Red" also gives the emergency vehicles the clearance to use the opposing lanes and any other clear space in the intersection etc, coupled with the fact that at any intersection, you ONLY want the emergency vehicles moving...no others.
Any system that creates "green" for the person with the strobe is, in my opinion, an inherently dangerous system. It encourages people to try this kind of stuff and makes people think that the ambulance or fire-engine behind them "won't mind if I go through too". The more moving vehicles there are, even if they're with the flow of the emergency traffic, the more dangerous.
I can't imagine this system staying like it is for too long.
How about tracking the emergency vehicles through GPS, then having the central traffic computers switch the lights around the emergency vehicle (far ahead) in such a way as to clear the path 2 blocks away and keep all opposing traffic off the intended path. For instance, lanes turning away from the path would be allowed to turn green so the vehicles could clear the area, lanes crossing would be halted 1 or 2 blocks away, and lights behind the emergency vehicle would stay red for some reasonable period of time to keep the lawyers a reasonable distance from the ambulances...most people wouldn't even see the emergency vehicles, as they would be sitting at a red light 1 or 2 blocks away, or simply shunted away from the path, and the ambulance/fire-truck driver would not even have to contend with stopped or moving traffic.
This isn't too much to put on one of those little PLC traffic computers, and it would be a lot better than "strobe light gets the green" solution that these people thought up.
This will probably been the next gadget added to the Swiss Army PDA/phone combos.
:)
Before long will see those soccer moms with 3 kids in the back of her gas-guzzler pointing her cell phone at the light in between breaths of talking to her friends from the social club.
Life is so unfair.
The traffic light control system itself is called Opticom . It is patented and manufactured by 3M.
It operates using very short pulses of light (< 10uS) occuring at a precise frequency (usually crystal controlled). The normal pulse rate is about 10Hz. An optional rate of around 12.5Hz can be used to give priority to other vehicles (ex. ambulance vs firetruck).
The system is configurable and normally set to give a green light to the emergency vehicle (helping to clear traffic) but it can also be set to go red in all directions.
PROBLEM; Light goes green.
Design the device to make the lights go RED in all directions. Emergency vehicles can safely drive around the waiting traffic on the 'wrong' side of the road, because there's no oncoming traffic. There's no 'subtle' way for a non-emergency vehicle to use this type of device.
455fe10422ca29c4933f95052b792ab2
Obviously you have never driven in Louisiana...red light means hurry up.
yesss i'm building one in my basement right now.
gonna bet my gf a bj that there are no red lights on our drive home tomorrow.
wish me luck!
geek gear
Emergency vehicles are still required to stop on a Red, then proceed. Stopping at each red light before proceeding shaves off seconds, and in the case of life-threatening injuring those few seconds could be crucial.
I'd say that it should be very, very illegal for normal people to have these devices, perhaps you could give certain traffic lights a camera that snaps the license of whomever flashed it the "green" signal, therefore determining whom is making unauthorized use of the system
Don't worry, some day maybe you'll be able to afford a gas guzzler and join a social club, too.
Stupid sexy Flanders.