It is necessary to couple an OBU to a vehicle. If an OBU is not coupled to a vehicle, it is not working. If you only order one OBU, it is automatically coupled to the vehicle you registered last.
If you order multiple OBUs, you must couple them to the vehicles you have registered. This makes the system very flexible, as you are free to switch your OBUs between your vehicles.
You can decouple an OBU at any time to switch it from one registered vehicle to another. This means you do not need as many OBUs as you have vehicles, or you can have spare OBUs to use in different vehicles.
When you couple your OBU to another vehicle:
- You do not have to pay the deposit again
- You will have to reselect the desired payment method for paying the toll