Sticker transponders do not beep.
Hardcase, switchable transponders issued after July 5, 2020, are made with the same battery-free technology as sticker transponders and, therefore, do not beep. If, for some reason, a toll isn’t collected based on a reading of a transponder, the toll is collected using a photo of the vehicle’s license plates. So, make sure the vehicle information listed on your account is up-to-date.
If your hardcase transponder was issued prior to July 5, 2020, and doesn’t beep, it may not be working properly. Please review your recent toll road activity. If you notice a high number of "pay-by-plate" transactions, you need a new transponder. To order a new transponder, log in to your account online or via The Toll Roads app, select "Transponders" and click "Replace” next to the transponder you wish to replace.