On 12/30/2009 04:28 PM, Mike Kershaw wrote: > On Wed, Dec 30, 2009 at 03:55:37PM -0500, Sean Phelan wrote: >>> there is talk of adding rfid chips to cars. >> >> My understanding of RFID chips is that the range is pretty limited, >> so it's probably not the best option for "tracking" a car (you'd >> need sensors attached to every mile marker). It _could_ be very >> useful for the next generation EZPASS - if the car has a unique >> number, you could run highway tolls off that instead of a customized >> transponder. > > RFID is USUALLY short range, but not always. EZ-Pass is basically RFID > tech, and works at N MPH (look at the fast-lane stuff on the jersey > turnpike)
IIRC the design spec for N was 100 mph on ezpass. The fact that you are
usually stopping at a toll plaza is just because that was the physical
infrastructure to manage tolls in the past. Delaware also has large
stretches of tolls where if you have ezpass you stay on the highway at
65+mph, if you don't, you have to pull off to pay a toll.
-Sean
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Sean Dague Mid-Hudson Valley
sean at dague dot net Linux Users Group
http://dague.net http://mhvlug.org
There is no silver bullet. Plus, werewolves make better neighbors
than zombies, and they tend to keep the vampire population down.
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