Nice in theory but unfortunately the sensors are not that sensitive to read a unique footprint or EM signature. Vehicle detectors come in a handful of varieties but the two most prevalant ones are electromagentic and sidefire radar. The EM sensors only reads the change in EM field as a vehicle passes through. Again, not a unique signature. With sidefire radar, all you are doing is measuring vehicle presense, speed and sometimes classification.
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Nice in theory but unfortunately the sensors are not that sensitive to read a unique footprint or EM signature. Vehicle detectors come in a handful of varieties but the two most prevalant ones are electromagentic and sidefire radar. The EM sensors only reads the change in EM field as a vehicle passes through. Again, not a unique signature. With sidefire radar, all you are doing is measuring vehicle presense, speed and sometimes classification.