[TacticalCoder]

> Certain tollroad systems, such as France's Bip & Go télépéage, require a physical Radio-frequency identification (RFID) tag to be present in the car for authentication purposes.

Only if you want to pass the toll / "télépéage" without having to stop for paying "manually" (using a credit card of whatever).

I've got one and now you can pass most tolls without stopping (but you need to slow down to about 30 km/h // 20 mph).

[mig39]

I recently took a Spanish rental car to Portugal for more than a month. I registered the license plate number and a credit card on the Portuguese tolls website.

I then used a bunch of toll highways that were "electronic only" and received the appropriate charges on my credit card a few days later.

I think if you're going to set up a toll system in the future, then this is the tech you're going to use. Not RFID or transponders. Just read the license plate and charge the user.

There were options, BTW, to pay in cash, with pre-paid cards, etc, that didn't directly tie your identity to the plate. But I assume the rental agency will tie me to the plate, so used my credit card anyway.

[rootusrootus]

> I think if you're going to set up a toll system in the future, then this is the tech you're going to use. Not RFID or transponders. Just read the license plate and charge the user.

In my experience any tolling system set up in the past decade is this way. No worries about transponders, they just have a bunch of cameras over the lanes and then send you a bill. Works even for out-of-state plates.

[skywhopper]

Transponders (not sure if it’s RFID per se) are common on toll highways in the US and can operate at full highway speeds. But at least with the system I’m familiar with (I-Pass in the Chicago area), if your transponder is broken or missing, they will correlate your license plate to your account via photo.