Transponder Types Tooltip Content
License Plate Mounted
Fewer than 1% of vehicles have windshields or systems that interfere with transactions using the windshield-mounted transponder. In this case, a license plate transponder (LPT) is required. Check the list of vehicles we've identified that require LPTs.
The roof mounted transponder is recommended for large commercial vehicles, such as trucks, buses, coaches and RVs.
The windshield transponder is the most common transponder type. These transponders work in 99% of vehicles.