Actually, it wouldn't be necessary to track someone in real-time down the highway, and toll-gates or on/off-ramps (which would be less successful but somewhat workable IMHO) would make great places to scan within a small enough envelope (the ramps would be somewhat problematic still) to avoid confusion, and in a situation where cars are in a single-file line.

Of course, the whole dynamic changes when you buy a set of used or specialty (say, off-road) tires that don't have a large enough volume to justify tags, yes?

Devil's Advocate aside, there are easier ways to track a car's movements en masse without having to make something microscopic anyway... put a real tranciever into the car's onboard engine computer and you're done - most folks wouldn't dare touch it, and even trained mechanics would be queasy about diabling part of the computer (in a sealed box no less) that keeps the car's engine operating. It would require a whole lot to avoid having one of those babies running in your auto.

It isn't so much the scare tactic reaction that makes it all unworkable, but the practical and fiscal aspects as well... it would be nearly impossible to maintain the database requried, and most companies wouldn't (and quite frankly couldn't) justify the cost.


/P


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