&gt; Some folks at UC Berkeley built an RFID reading device you could put by the side of a (one lane) road (like an on-ramp) and read the tires from it. From a traffic analysis standpoint it would be much more effective than those hoses they put across the road to measure cars going by.<p>Why would that be much more effective? Do the hoses have significant count errors, or is it that the RFID system will let them tell what make&#x2F;model of tire went by and so infer data such as vehicle type that they do not get from the hose system?