Toll Pass Transponders

Transponder… it’s such a weird sounding word, but it’s pretty simple to explain: it sends a signal when it receives a signal (

So, when you roll up to your EZ-Pass or Fastrak lane, a transponder reader gives your toll tag a signal to have your tag give it a signal in return so the network can process your vehicle information.  All of this signal is sent via radio waves.  (More info here:

The transponder receives power only when it goes through a reader, which makes it a passive RFID chip (radio frequency identification) (

Leave a Reply

Your email address will not be published.