This is NYC, the realm of the totalitarian bloomberg, who is a noted fan on controlling and tracking people. The device is obviously built to wake up on a carrier and wait for a magic packet, then reply.
To do that, it must wake up sometimes just on signals that happen to land on the carrier frequency. Could it be triggered by things like cellphone hails, like what usually happens to radios when you have someone calling nearby? A while ago EZ-Pass had issues where cell phones would wake a EZ-Pass, especially if you had a built in phone interface in your car. My battery died after 6 months of use.
They gave me a new one…6 months later dead…. At some point they did change the frequency of the tags to prevent that. Though it can still be activated by background noise from phones or other devices. Rev your engine just right and it can turn it on.
Take this one step further. Is there reader identification data that is transmitted when reading a tag? If so, what would you have to do to in order to capture that info? He also mentions that NYSDOT confirmed that they read tags at non-toll locations for the purpose of generating travel time estimates.
The point was, what other things can cause the tag to activate, but not necessarily broascast its signal? I used the electric start on a gas stove which sparks every second holding it on to start. It it did not active, nor had cell phones idle or making a call , nor driving past cell towers, power lines, nor a power co-generation plant.
Would it be possible to test this theory with workbench-grade software defined radio? If anything it should be easy to find out the frequencies that wake the transponders up. Some of the goals was the parts could be obtained at radios shack and it was easy.
Also the design of ezpass itself is simple, to set of the transponder. When it receives a This is consitent with mine, others with an ezpass and MHz radios can confirm this easily. Its ISM band, so yes false positives exist and part of the exercise is to find the ezpass readers once you are notified the transponder triggered.
I get notified, but is it reading ezpasses? Thanks for coming in to the comments section! Neat project. It may result in a non-working tag. Also, that would involve modification of the tag. Those write to the tag when you enter where in olden times you would have taken a ticket and read it back when you exit where you would have returned the ticket and paid.
The memory is backed by the battery so pulling power would cause it to lose the entry location — which would result in you getting charged the maximum toll for that road. More likely, they just log which entrances and exits you use and bill you accordingly. EZPass statements show every exit and entrance that you use. EZ-Pass tags have been replaced in our area with non-removable with destroying stickers. No easy way to prevent non-toll reads. I have one of those. Twenty-some years ago I heard about the apprehension of a suspected terrorist.
The radio played the voice of a sheriff with a southern drawl saying something like.. But hey.. Hip bones and flesh are dense enough to block its signal. If yours is no longer working as it should, contact EZ Pass customer service or take the transponder to any of their service centers near you.
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