E-ZPass Flex is an E-ZPass with an additional switchable feature designed specifically for those traveling on Express Lanes. This transponder will specifically benefit those who are traveling with the number of people in their vehicle required to qualify for an HOV discount (2 or 3 depending on the roadway).

When you have the required number of people in your vehicle for that roadway, you can simply slide the switch to the right and the Flex transponder will display "HOV ON." Do this before entering the roadway and you can ride the designated Express Lanes at a discounted toll rate. For those riding with fewer than the required number of people in the vehicle, just slide the switch all the way to the left, covering the words "HOV ON," and travel the designated Express Lanes at the posted toll rate. E-ZPass Flex also works like a standard E-ZPass on all other toll roads wherever E-ZPass is accepted regardless of the position of the switch.

E-ZPass Flex is currently used for discounts on roads in Virginia & North Carolina.  The special transponder can be obtained from the Virginia, North Carolina and Maryland Customer Service Centers.