When you enter a gate area be sure you wait behind the sensor line until you are the next vehicle. The "fast arms" will be closed in front of you. Proceed forward into the transponder sensor area and the "fast arms" will go up. The arms will stay up until your vehicle clears the ground sensors which are beyond the area where the gates would close on your vehicle. If a vehicle, without a transponder, attempts to tailgate, the “fast arms" will likely close on that vehicle, cameras will record it, and our patrol cars will be notified.
The transponder sensor area varies depending upon atmospheric conditions, the type of transponder you have and where it is placed on your vehicle, so your individual sensor "trip area" will vary. It is possible that your vehicle could trip the sensor before passing the sensor line. So if the vehicle in front of you clears the gate closure area and the "fast arms" stay up, you may proceed through the gates.